diff --git a/src/server/BreCal/database/sql_handler.py b/src/server/BreCal/database/sql_handler.py
index 9b1e086..2d85175 100644
--- a/src/server/BreCal/database/sql_handler.py
+++ b/src/server/BreCal/database/sql_handler.py
@@ -79,6 +79,15 @@ def execute_sql_query_standalone(query, param={}, pooledConnection=None, model=N
 
         elif command_type=="execute":
             schemas = commands.execute(query, param=param)
+        elif command_type=="single":
+            sentinel = object()
+
+            # pulls a *single* row from the query. Typically, these queries require an ID within the param dictionary.
+            # when providing a model, such as model.Shipcall, the dataset is immediately translated into a data model.
+            schemas = commands.query_single_or_default(query, sentinel, param=param) if model is None else commands.query_single_or_default(query, sentinel, param=param, model=model)
+            if schemas is sentinel:
+                raise Exception("no such record")
+
         else:
             raise ValueError(command_type)
         
diff --git a/src/server/BreCal/database/sql_queries.py b/src/server/BreCal/database/sql_queries.py
index e69ea87..51a3dea 100644
--- a/src/server/BreCal/database/sql_queries.py
+++ b/src/server/BreCal/database/sql_queries.py
@@ -25,25 +25,6 @@ def create_sql_query_shipcall_get(options:dict)->str:
     "(etd >= DATE(NOW() - INTERVAL %d DAY)))) " +
     "ORDER BY eta") % (options["past_days"], options["past_days"], options["past_days"], options["past_days"])
 
-    """
-    alternatively, f-strings could be used.
-        query_two = ("SELECT s.id as id, ship_id, type, eta, voyage, etd, arrival_berth_id, departure_berth_id, tug_required, pilot_required, " +
-        "flags, s.pier_side, bunkering, replenishing_terminal, replenishing_lock, draft, tidal_window_from, " +
-        "tidal_window_to, rain_sensitive_cargo, recommended_tugs, anchored, moored_lock, canceled, evaluation, " +
-        "evaluation_message, evaluation_time, evaluation_notifications_sent, s.created as created, s.modified as modified, time_ref_point " +
-        "FROM shipcall s " +
-        "LEFT JOIN times t ON t.shipcall_id = s.id AND t.participant_type = 8 " +
-        "WHERE " +
-        "(type = 1 AND  " +
-        f"((t.id IS NOT NULL AND t.eta_berth >= DATE(NOW() - INTERVAL {options['past_days']} DAY)) OR " +
-        f"(eta >= DATE(NOW() - INTERVAL {options['past_days']} DAY)))) OR " +
-        "((type = 2 OR type = 3) AND " +
-        f"((t.id IS NOT NULL AND t.etd_berth >= DATE(NOW() - INTERVAL {options['past_days']} DAY)) OR " +
-        f"(etd >= DATE(NOW() - INTERVAL {options['past_days']} DAY)))) " +
-        "ORDER BY eta")
-
-        assert query==query_two
-    """
     return query
 
 
@@ -100,7 +81,7 @@ def create_sql_query_shipcall_post(schemaModel:dict)->str:
         isNotFirst = True
         query += "?" + param_key + "?"
     query += ")"
-    return
+    return query
 
 def create_sql_query_shipcall_put(schemaModel:dict)->str:
     query = "UPDATE shipcall SET "
@@ -162,6 +143,53 @@ def create_sql_query_user_put(schemaModel:dict):
     query += "WHERE id = ?id?"
     return query
 
+def create_sql_query_ship_post(schemaModel:dict):
+    query = "INSERT INTO ship ("
+    isNotFirst = False
+    for key in schemaModel.keys():
+        if key == "id":
+            continue
+        if key == "created":
+            continue
+        if key == "modified":
+            continue
+        if isNotFirst:
+            query += ","
+        isNotFirst = True
+        query += key
+    query += ") VALUES ("
+    isNotFirst = False
+    for key in schemaModel.keys():
+        if key == "id":
+            continue
+        if key == "created":
+            continue
+        if key == "modified":
+            continue
+        if isNotFirst:
+            query += ","
+        isNotFirst = True
+        query += "?" + key + "?"
+    query += ")"
+    return query
+
+def create_sql_query_ship_put(schemaModel:dict):
+    query = "UPDATE ship SET "
+    isNotFirst = False
+    for key in schemaModel.keys():
+        if key == "id":
+            continue
+        if key == "created":
+            continue
+        if key == "modified":
+            continue
+        if isNotFirst:
+                query += ", "
+        isNotFirst = True
+        query += key + " = ?" + key + "? "
+
+    query += "WHERE id = ?id?"
+    return query
 
 
 
@@ -213,8 +241,24 @@ class SQLQuery():
     
     @staticmethod
     def get_shipcalls(options:dict={'past_days':3})->str:
+        # a pytest proves this method to be identical to create_sql_query_shipcall_get(options)
         assert 'past_days' in list(options.keys()), f"there must be a key 'past_days' in the options, which determines, how recent the returned list of shipcalls shall be." # part of a pytest.raises
-        query = create_sql_query_shipcall_get(options)
+        past_days = options['past_days']
+
+        query = ("SELECT s.id as id, ship_id, type, eta, voyage, etd, arrival_berth_id, departure_berth_id, tug_required, pilot_required, " + \
+            "flags, s.pier_side, bunkering, replenishing_terminal, replenishing_lock, draft, tidal_window_from, " + \
+            "tidal_window_to, rain_sensitive_cargo, recommended_tugs, anchored, moored_lock, canceled, evaluation, " + \
+            "evaluation_message, evaluation_time, evaluation_notifications_sent, s.created as created, s.modified as modified, time_ref_point " + \
+            "FROM shipcall s " + \
+            "LEFT JOIN times t ON t.shipcall_id = s.id AND t.participant_type = 8 " + \
+            "WHERE " + \
+            "(type = 1 AND  " + \
+            f"((t.id IS NOT NULL AND t.eta_berth >= DATE(NOW() - INTERVAL {past_days} DAY)) OR " + \
+            f"(eta >= DATE(NOW() - INTERVAL {past_days} DAY)))) OR " + \
+            "((type = 2 OR type = 3) AND " + \
+            f"((t.id IS NOT NULL AND t.etd_berth >= DATE(NOW() - INTERVAL {past_days} DAY)) OR " + \
+            f"(etd >= DATE(NOW() - INTERVAL {past_days} DAY)))) " + \
+            "ORDER BY eta")
         return query
     
     @staticmethod
@@ -254,4 +298,121 @@ class SQLQuery():
     def get_participants()->str:
         query = "SELECT participant_id, type FROM shipcall_participant_map WHERE shipcall_id=?shipcall_id?"
         return query
-    
\ No newline at end of file
+    
+    @staticmethod
+    def get_shipcall_post(schemaModel:dict)->str:
+        # a pytest proves this method to be identical to create_sql_query_shipcall_post(schemaModel)
+
+        param_keys = {key:key for key in schemaModel.keys()}
+        param_keys["type"] = "type_value"
+        param_keys["evaluation"] = "evaluation_value"
+
+        prefix = "INSERT INTO shipcall ("
+        bridge = ") VALUES ("
+        suffix = ")"
+
+        stage1 = ",".join([key for key in schemaModel.keys() if not key in ["id","participants","created","modified","evaluation","evaluation_message","type_value","evaluation_value"]])
+        stage2 = ",".join([f"?{param_keys.get(key)}?" for key in schemaModel.keys() if not key in ["id","participants","created","modified","evaluation","evaluation_message","type_value","evaluation_value"]])
+
+        query = prefix+stage1+bridge+stage2+suffix
+        return query
+
+    @staticmethod
+    def get_last_insert_id()->str:
+        query = "select last_insert_id()"
+        return query
+    
+    @staticmethod
+    def get_shipcall_post_last_insert_id()->str:
+        """alias function. May be deleted soon"""
+        query = SQLQuery.get_last_insert_id()
+        return query
+    
+    @staticmethod
+    def get_shipcall_post_update_shipcall_participant_map()->str:
+        query = "INSERT INTO shipcall_participant_map (shipcall_id, participant_id, type) VALUES (?shipcall_id?, ?participant_id?, ?type?)"
+        return query
+    
+    @staticmethod
+    def create_sql_query_history_post()->str:
+        query = create_sql_query_history_post()
+        return query
+    
+    @staticmethod
+    def get_shipcall_by_id()->str:
+        query = "SELECT * FROM shipcall where id = ?id?"
+        return query
+    
+    @staticmethod
+    def get_shipcall_put(schemaModel:dict)->str:
+        # a pytest proves this method to be identical to create_sql_query_shipcall_put(schemaModel)
+        param_keys = {key:key for key in schemaModel.keys()}
+        param_keys["type"] = "type_value"
+        param_keys["evaluation"] = "evaluation_value"
+
+        prefix = "UPDATE shipcall SET "
+        suffix = "WHERE id = ?id?"
+        body = ", ".join([f"{key} = ?{param_keys.get(key)}? " for key in schemaModel.keys() if key not in ["id", "participants", "created", "modified", "evaluation", "evaluation_message", "type_value", "evaluation_value"]])
+
+        query = prefix + body + suffix
+        return query
+    
+    @staticmethod
+    def get_shipcall_participant_map_by_shipcall_id()->str:
+        query = "SELECT id, participant_id, type FROM shipcall_participant_map where shipcall_id = ?id?"
+        return query
+
+    @staticmethod
+    def get_shipcall_participant_map_delete_by_id()->str:
+        query = "DELETE FROM shipcall_participant_map WHERE id = ?existing_id?"
+        return query
+
+    @staticmethod
+    def create_sql_query_history_put()->str:
+        query = create_sql_query_history_put()
+        return query
+
+    @staticmethod
+    def get_ship_post(schemaModel:dict)->str:
+        # a pytest proves this method to be identical to create_sql_query_ship_post(schemaModel)
+        prefix = "INSERT INTO ship ("
+        suffix = ")"
+        bridge = ") VALUES ("
+
+        stage1 = ",".join([key for key in schemaModel.keys() if not key in ["id", "created", "modified"]])
+        stage2 = ",".join([f"?{key}?" for key in schemaModel.keys() if not key in ["id", "created", "modified"]])
+
+        query = prefix + stage1 + bridge + stage2 + suffix
+        return query
+
+    @staticmethod
+    def get_ship_put(schemaModel:dict)->str:
+        # a pytest proves this method to be identical to create_sql_query_ship_put(schemaModel)
+        prefix = "UPDATE ship SET "
+        suffix = "WHERE id = ?id?"
+        body = ", ".join([f"{key} = ?{key}? " for key in schemaModel.keys() if not key in ["id","created","modified"]])
+
+        query = prefix + body + suffix
+        return query
+
+    @staticmethod
+    def get_ship_delete_by_id()->str:
+        query = "UPDATE ship SET deleted = 1 WHERE id = ?id?"
+        return query
+    
+    @staticmethod
+    def get_notification_post()->str:
+        raise NotImplementedError()
+        # #TODO: this query is wrong and just a proxy for a POST request
+        query = "INSERT INTO shipcall_participant_map (shipcall_id, participant_id, type) VALUES (?shipcall_id?, ?participant_id?, ?type?)"
+        return query
+    
+    @staticmethod
+    def get_shipcall_put_notification_state()->str:
+        raise NotImplementedError()
+        # #TODO: use evaluation_notifications_sent here and consider only the shipcall_id
+        # #TODO: query
+        query = ...
+        return query
+
+
diff --git a/src/server/BreCal/database/update_database.py b/src/server/BreCal/database/update_database.py
index 4c120f3..395f725 100644
--- a/src/server/BreCal/database/update_database.py
+++ b/src/server/BreCal/database/update_database.py
@@ -34,6 +34,7 @@ def update_shipcall_in_mysql_database(sql_connection, shipcall:Shipcall, relevan
 
 def build_mysql_query_to_update_shipcall(shipcall, relevant_keys:list):
     """builds a mysql query, which updates the shipcall table. In particular, the provided shipcall will be updated for each key in {relevant_keys}"""
+    # #TODO: refactor into SQLQuery
     schemaModel = shipcall.__dict__
 
     # prepare prefix and suffix. Then build the body of the query
@@ -55,7 +56,6 @@ def update_all_shipcalls_in_mysql_database(sql_connection, sql_handler:SQLHandle
         sql_handler: an SQLHandler instance
         shipcall_df: dataframe, which stores the data that is used to retrieve the shipcall data models (that are then updated in the database)
     """
-    print(shipcall_df)
     for shipcall_id in shipcall_df.index:
         shipcall = sql_handler.df_loc_to_data_model(df=shipcall_df, id=shipcall_id, model_str="shipcall")
         update_shipcall_in_mysql_database(sql_connection, shipcall=shipcall, relevant_keys = ["evaluation", "evaluation_message"])
diff --git a/src/server/BreCal/impl/shipcalls.py b/src/server/BreCal/impl/shipcalls.py
index bb3a9e4..83385cf 100644
--- a/src/server/BreCal/impl/shipcalls.py
+++ b/src/server/BreCal/impl/shipcalls.py
@@ -73,7 +73,7 @@ def PostShipcalls(schemaModel):
         pooledConnection = local_db.getPoolConnection()
         commands = pydapper.using(pooledConnection)
 
-        # query = create_sql_query_shipcall_post(schemaModel)
+        # query = SQLQuery.get_shipcall_post(schemaModel) # create_sql_query_shipcall_post(schemaModel)
         query = "INSERT INTO shipcall ("
         isNotFirst = False
         for key in schemaModel.keys():
@@ -126,22 +126,15 @@ def PostShipcalls(schemaModel):
             isNotFirst = True
             query += "?" + param_key + "?"
         query += ")"
-
-        # #TODO: enter completeness validation here. Only shipcalls, where all required fields are filled in are valid
-        # "Pflichtfelder: z.B. die Felder bei der Neuanlage eines shipcalls müssen entsprechend des Anlauf-Typs belegt sein, damit gespeichert werden kann" - Daniel Schick
-
-        # #TODO: enter role validation here. Only users of correct type should be allowed to post a shipcall
-
-        # #TODO: enter reference validation here
-        # full_id_existances = check_id_existances(mysql_connector_instance=sql_connection, schemaModel=schemaModel, debug=False)
-        # if not full_id_existances:
-        # pooledConnection.close()
-        # return json.dumps({"message" : "call failed. missing mandatory keywords."}), 500, {'Content-Type': 'application/json; charset=utf-8'}
         commands.execute(query, schemaModel)
+
+        # lquery = SQLQuery.get_shipcall_post_last_insert_id()
+        # new_id = commands.execute_scalar(lquery)
         new_id = commands.execute_scalar("select last_insert_id()")
 
         # add participant assignments if we have a list of participants
         if 'participants' in schemaModel:
+            # pquery = SQLQuery.get_shipcall_post_update_shipcall_participant_map()
             pquery = "INSERT INTO shipcall_participant_map (shipcall_id, participant_id, type) VALUES (?shipcall_id?, ?participant_id?, ?type?)"
             for participant_assignment in schemaModel["participants"]:
                 commands.execute(pquery, param={"shipcall_id" : new_id, "participant_id" : participant_assignment["participant_id"], "type" : participant_assignment["type"]})
@@ -152,7 +145,7 @@ def PostShipcalls(schemaModel):
         # save history data
         # TODO: set ETA properly
         user_data = check_jwt()
-        # query = create_sql_query_history_post()
+        # query = SQLQuery.create_sql_query_history_post()
         query = "INSERT INTO history (participant_id, shipcall_id, user_id, timestamp, eta, type, operation) VALUES (?pid?, ?scid?, ?uid?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP, 1, 1)"
         commands.execute(query, {"scid" : new_id, "pid" : user_data["participant_id"], "uid" : user_data["id"]})
 
@@ -193,12 +186,14 @@ def PutShipcalls(schemaModel):
         # test if object to update is found
 
         sentinel = object()
+        # query = SQLQuery.get_shipcall_by_id()
+        # theshipcall = commands.query_single_or_default(query, sentinel, param={"id" : schemaModel["id"]})
         theshipcall = commands.query_single_or_default("SELECT * FROM shipcall where id = ?id?", sentinel, param={"id" : schemaModel["id"]})
         if theshipcall is sentinel:
             pooledConnection.close()
             return json.dumps("no such record"), 404, {'Content-Type': 'application/json; charset=utf-8'}
 
-        # query = create_sql_query_shipcall_put(schemaModel)
+        # query = SQLQuery.get_shipcall_put(schemaModel)
         query = "UPDATE shipcall SET "
         isNotFirst = False
         for key in schemaModel.keys():
@@ -230,18 +225,9 @@ def PutShipcalls(schemaModel):
 
         query += "WHERE id = ?id?"
 
-        # #TODO: enter role validation here. 
-
-        # #TODO: enter completeness validation here. Only shipcalls, where all required fields are filled in are valid
-
-
-        # #TODO: enter reference validation here
-        # full_id_existances = check_id_existances(mysql_connector_instance=sql_connection, schemaModel=schemaModel, debug=False)
-        # if not full_id_existances:
-        # return ... (500)
-
         affected_rows = commands.execute(query, param=schemaModel)
 
+        # pquery = SQLQuery.get_shipcall_participant_map_by_shipcall_id()
         pquery = "SELECT id, participant_id, type FROM shipcall_participant_map where shipcall_id = ?id?"
         pdata = commands.query(pquery,param={"id" : schemaModel["id"]}) # existing list of assignments
 
@@ -254,6 +240,7 @@ def PutShipcalls(schemaModel):
                     found_participant = True
                     break
             if not found_participant:
+                # nquery = SQLQuery.get_shipcall_post_update_shipcall_participant_map()
                 nquery = "INSERT INTO shipcall_participant_map (shipcall_id, participant_id, type) VALUES (?shipcall_id?, ?participant_id?, ?type?)"
                 commands.execute(nquery, param={"shipcall_id" : schemaModel["id"], "participant_id" : participant_assignment["participant_id"], "type" : participant_assignment["type"]})
 
@@ -265,15 +252,13 @@ def PutShipcalls(schemaModel):
                     found_participant = True
                     break;
             if not found_participant:
+                # dquery = SQLQuery.get_shipcall_participant_map_delete_by_id()
                 dquery = "DELETE FROM shipcall_participant_map WHERE id = ?existing_id?"
                 commands.execute(dquery, param={"existing_id" : elem["id"]})
 
-        # apply 'Traffic Light' evaluation to obtain 'GREEN', 'YELLOW' or 'RED' evaluation state. The function internally updates the mysql database
-        # evaluate_shipcall_state(mysql_connector_instance=pooledConnection, shipcall_id=schemaModel["id"]) # schemaModel["id"] refers to the shipcall id
-
         # save history data
         # TODO: set ETA properly
-        # query = create_sql_query_history_put()
+        # query = SQLQuery.create_sql_query_history_put()
         query = "INSERT INTO history (participant_id, shipcall_id, user_id, timestamp, eta, type, operation) VALUES (?pid?, ?scid?, ?uid?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP, 1, 2)"
         commands.execute(query, {"scid" : schemaModel["id"], "pid" : user_data["participant_id"], "uid" : user_data["id"]})
 
diff --git a/src/server/BreCal/impl/ships.py b/src/server/BreCal/impl/ships.py
index d557fd8..0733071 100644
--- a/src/server/BreCal/impl/ships.py
+++ b/src/server/BreCal/impl/ships.py
@@ -49,6 +49,7 @@ def PostShip(schemaModel):
         pooledConnection = local_db.getPoolConnection()
         commands = pydapper.using(pooledConnection)
 
+        # query = SQLQuery.create_sql_query_ship_post(schemaModel)
         query = "INSERT INTO ship ("
         isNotFirst = False
         for key in schemaModel.keys():
@@ -78,6 +79,8 @@ def PostShip(schemaModel):
         query += ")"
 
         commands.execute(query, schemaModel)
+        # nquery = SQLQuery.get_last_insert_id()
+        # new_id = commands.execute_scalar(nquery)
         new_id = commands.execute_scalar("select last_insert_id()")
 
         pooledConnection.close()
@@ -103,6 +106,7 @@ def PutShip(schemaModel):
         pooledConnection = local_db.getPoolConnection()
         commands = pydapper.using(pooledConnection)
 
+        # query = SQLQuery.create_sql_query_ship_put(schemaModel)
         query = "UPDATE ship SET "
         isNotFirst = False
         for key in schemaModel.keys():
@@ -143,6 +147,8 @@ def DeleteShip(options):
 
         pooledConnection = local_db.getPoolConnection()
         commands = pydapper.using(pooledConnection)
+        # query = SQLQuery.get_ship_delete_by_id()
+        # affected_rows = commands.execute(query, param={"id" : options["id"]})
         affected_rows = commands.execute("UPDATE ship SET deleted = 1 WHERE id = ?id?", param={"id" : options["id"]})
 
         pooledConnection.close()
diff --git a/src/server/BreCal/schemas/model.py b/src/server/BreCal/schemas/model.py
index d6683a7..92232e2 100644
--- a/src/server/BreCal/schemas/model.py
+++ b/src/server/BreCal/schemas/model.py
@@ -54,10 +54,19 @@ class EvaluationType(IntEnum):
     def _missing_(cls, value):
         return cls.undefined
 
-class NotificationType(IntEnum):
+class NotificationType(IntEnum): 
+    """
+    Any user has the attributes
+        'notify_email' -> NotificationType.email
+        'notify_popup' -> NotificationType.push
+        'notify_whatsapp' -> undeclared
+        'notify_signal' -> undeclared
+    """
     undefined = 0
     email = 1
     push = 2
+    # whatsapp = 3
+    # signal = 4
     
     @classmethod
     def _missing_(cls, value):
@@ -118,11 +127,17 @@ class GetVerifyInlineResp(Schema):
 
 @dataclass
 class Notification:
+    """
+    Base data class for any notification. 
+
+    Description:
+        'An entry corresponds to an alarm given by a violated rule during times update'
+    """
     id: int
-    shipcall_id: int
-    level: int
-    type: NotificationType
-    message: str
+    shipcall_id: int # 'shipcall record that caused the notification'
+    level: int # 'severity of the notification'
+    type: NotificationType # 'type of the notification'
+    message: str # 'individual message'
     created: datetime
     modified: datetime
 
@@ -436,6 +451,7 @@ class UserSchema(Schema):
     user_email = fields.String(allow_none=True, metadata={'Required':False}, validate=[validate.Length(max=64)])
     old_password = fields.String(allow_none=True, metadata={'Required':False}, validate=[validate.Length(max=128)])
     new_password = fields.String(allow_none=True, metadata={'Required':False}, validate=[validate.Length(min=6, max=128)])
+    # #TODO: the user schema does not (yet) include the 'notify_' fields
 
     @validates("user_phone")
     def validate_user_phone(self, value):
@@ -488,10 +504,10 @@ class User:
     user_phone: str
     password_hash: str
     api_key: str
-    notify_email: bool
-    notify_whatsapp: bool
-    notify_signal: bool
-    notify_popup: bool
+    notify_email: bool # #TODO_clarify: should we use an IntFlag for multi-assignment?
+    notify_whatsapp: bool # #TODO_clarify: should we use an IntFlag for multi-assignment?
+    notify_signal: bool # #TODO_clarify: should we use an IntFlag for multi-assignment?
+    notify_popup: bool # #TODO_clarify: should we use an IntFlag for multi-assignment?
     created: datetime
     modified: datetime
 
diff --git a/src/server/BreCal/stubs/shipcall.py b/src/server/BreCal/stubs/shipcall.py
index 1400112..299fdbe 100644
--- a/src/server/BreCal/stubs/shipcall.py
+++ b/src/server/BreCal/stubs/shipcall.py
@@ -201,3 +201,7 @@ def get_stub_shipcall_arrival_invalid_missing_type():
     post_data.pop("type", None)
     return post_data
 
+def get_stub_valid_ship_loaded_model(post_data):
+    from BreCal.schemas import model
+    loadedModel = model.ShipcallSchema().load(data=post_data, many=False, partial=True)
+    return loadedModel
diff --git a/src/server/tests/database/test_sql_queries.py b/src/server/tests/database/test_sql_queries.py
index 97934f6..f490eed 100644
--- a/src/server/tests/database/test_sql_queries.py
+++ b/src/server/tests/database/test_sql_queries.py
@@ -284,4 +284,244 @@ def test_sql_get_all_shipcalls_and_assign_participants():
     ]), f"at least one of the shipcalls should have an assigned model.Participant_Assignment"
     return
 
+def test_sqlquery_get_shipcal_post_identical_to_create_sql_query_shipcall_post():
+    from BreCal.database.sql_queries import create_sql_query_shipcall_post
+    from BreCal.stubs.shipcall import get_stub_valid_shipcall_shifting, get_stub_valid_ship_loaded_model
+
+    post_data = get_stub_valid_shipcall_shifting()
+    schemaModel = get_stub_valid_ship_loaded_model(post_data)
+    query1 = SQLQuery.get_shipcall_post(schemaModel) # refactored variant of create_sql_query_shipcall_post (more concise)
+    query2 = create_sql_query_shipcall_post(schemaModel)
+
+    assert query1==query2
+    return
+
+def test_sql_post_shipcall():
+    """issues a post-request with stub data and adds it to the database."""
+    from BreCal.database.sql_queries import create_sql_query_shipcall_post
+    from BreCal.stubs.shipcall import get_stub_valid_shipcall_shifting, get_stub_valid_ship_loaded_model
+    
+    pooledConnection = local_db.getPoolConnection()
+    try:
+        commands = pydapper.using(pooledConnection)
+
+        post_data = get_stub_valid_shipcall_shifting()
+        post_data["voyage"] = "pytestRS71" # perform tagging to identify the shipcalls created by pytests (<16 characters, no special characters).
+        schemaModel = get_stub_valid_ship_loaded_model(post_data)
+        query = SQLQuery.get_shipcall_post(schemaModel) # refactored variant of create_sql_query_shipcall_post (more concise)
+        schemas = execute_sql_query_standalone(query=query, param=schemaModel, command_type="execute", pooledConnection=pooledConnection)
+        assert schemas==1, f"unsuccessful query execution. Query: {query}"
+
+        # within the same pooledConnection, ask for the last inserted id
+        query = SQLQuery.get_shipcall_post_last_insert_id()
+        new_id = commands.execute_scalar(query)
+        assert new_id > 0, f"the new id should be unlike 0.."
+
+        # add participant assignments if we have a list of participants
+        if 'participants' in schemaModel:
+            pquery = SQLQuery.get_shipcall_post_update_shipcall_participant_map()
+            for participant_assignment in schemaModel["participants"]:
+                schemas = execute_sql_query_standalone(query=pquery, param={"shipcall_id" : new_id, "participant_id" : participant_assignment["participant_id"], "type" : participant_assignment["type"]}, command_type="execute", pooledConnection=pooledConnection)
+
+
+        from BreCal.stubs.user import get_user_simple
+        # assign an artificial user with id 29 (maxm) & participant type 136
+        user_data = get_user_simple().__dict__
+        user_data["id"] = 29
+        user_data["participant_id"] = 136
+
+        # POST in the history
+        query = SQLQuery.create_sql_query_history_post()
+        schemas = execute_sql_query_standalone(query=query, param={"scid" : new_id, "pid" : user_data["participant_id"], "uid" : user_data["id"]}, command_type="execute", pooledConnection=pooledConnection)
+        assert schemas == 1, f"unsuccessful history POST"
+
+
+    finally:
+        pooledConnection.close()
+    return
+
+def test_sql_create_history_post_matches_legacy_function():
+    from BreCal.database.sql_queries import create_sql_query_history_post
+
+    query_refactored = SQLQuery.create_sql_query_history_post()
+    query_legacy = create_sql_query_history_post()
+    assert isinstance(query_refactored,str)
+    assert query_refactored==query_legacy, f"the refactored code to generate the query must be absolutely identical to the legacy version"
+    return
+
+def test_sql_get_shipcall_by_id():
+    schemaModel = {"id":63}
+
+    sentinel = object()
+    query = SQLQuery.get_shipcall_by_id()
+    pooledConnection = local_db.getPoolConnection()
+    commands = pydapper.using(pooledConnection)
+    theshipcall = commands.query_single_or_default(query, sentinel, param={"id" : schemaModel["id"]}, model=model.Shipcall)
+    pooledConnection.close()
+    assert not theshipcall is sentinel, f"failed GET user query"
+    assert theshipcall.id==schemaModel["id"]
+    return
+
+def test_sql_get_shipcall_by_id_short_version():
+    schemaModel = {"id":63}
+
+    # when model is defined, returns the data model
+    query = SQLQuery.get_shipcall_by_id()
+    schemas = execute_sql_query_standalone(query=query, param={"id" : schemaModel["id"]}, model=model.Shipcall, command_type="single")
+
+    assert schemas.id==schemaModel["id"]
+    assert isinstance(schemas, model.Shipcall)
+
+    # when model = None, returns a dictionary
+    query = SQLQuery.get_shipcall_by_id()
+    schemas = execute_sql_query_standalone(query=query, param={"id" : schemaModel["id"]}, command_type="single")
+    assert isinstance(schemas, dict)
+    assert schemas.get("id")==schemaModel["id"]
+    return
+
+def test_sql_get_shipcall_put_refactored_equals_extended_version():
+    from BreCal.database.sql_queries import create_sql_query_shipcall_put
+    from BreCal.stubs.shipcall import get_stub_valid_shipcall_shifting, get_stub_valid_ship_loaded_model
+
+    post_data = get_stub_valid_shipcall_shifting()
+    post_data["voyage"] = "pytestRS71" # perform tagging to identify the shipcalls created by pytests (<16 characters, no special characters).
+    schemaModel = get_stub_valid_ship_loaded_model(post_data)
+
+    legacy_query = create_sql_query_shipcall_put(schemaModel)
+    refactored_query = SQLQuery.get_shipcall_put(schemaModel)
+
+    assert refactored_query == legacy_query, f"version conflict. the refactored query must precisely match the legacy query!"
+    return
+
+def test_sql_get_shipcall_participant_map_by_shipcall_id():
+    schemaModel = {"id":152}
+
+    query = SQLQuery.get_shipcall_participant_map_by_shipcall_id()
+    pdata = execute_sql_query_standalone(query=query, param={"id" : schemaModel["id"]}, command_type="query") # existing list of assignments
+
+    assert len(pdata)==4, f"there should be four assigned participants for the shipcall with id {schemaModel.get('id')}"
+    return
+
+def test_sql__get_shipcall__get_spm__optionally_update_shipcall():
+    schemaModel = {'id': 152}
+    query = SQLQuery.get_shipcall_by_id()
+    shipcall = execute_sql_query_standalone(query=query, param={"id" : schemaModel["id"]}, command_type="single", model=model.Shipcall)
+
+    query = SQLQuery.get_shipcall_participant_map_by_shipcall_id()
+    pdata = execute_sql_query_standalone(query=query, param={"id" : shipcall.id}, command_type="query") # existing list of assignments
+
+    assert len(pdata)==4, f"there should be four assigned participants for the shipcall with id {shipcall.id}"
+
+    for participant_assignment in shipcall.participants:
+        found_participant = False
+        for elem in pdata:
+            if elem["participant_id"] == participant_assignment["participant_id"] and elem["type"] == participant_assignment["type"]:
+                found_participant = True
+                break
+        if not found_participant:
+            nquery = SQLQuery.get_shipcall_post_update_shipcall_participant_map()
+            ndata = execute_sql_query_standalone(query=nquery, param={"shipcall_id" : shipcall.id, "participant_id" : participant_assignment["participant_id"], "type" : participant_assignment["type"]}, command_type="execute") # existing list of assignments
+    return
+
+def test_sql__shipcall_post__get_last_insert_id__get_spm__update_participants__verify_changes():
+    """
+    this combinatorial test:
+    1.) creates a novel shipcall
+    2.) obtains the ID of the just-created shipcall
+    3.) reads the participant map for that ID and verifies, that there are no participants listed
+    4.) iteratively updates the participant map of the ID (using proxy data)
+    5.) verifies the update
+    """
+    from BreCal.stubs.shipcall import get_stub_valid_shipcall_shifting, get_stub_valid_ship_loaded_model
+    pooledConnection = local_db.getPoolConnection()
+    commands = pydapper.using(pooledConnection)
+    try:
+
+        # 1.) create shipcall
+        post_data = get_stub_valid_shipcall_shifting()
+        post_data["voyage"] = "pytestRS71" # perform tagging to identify the shipcalls created by pytests (<16 characters, no special characters).
+        schemaModel = get_stub_valid_ship_loaded_model(post_data)
+        query = SQLQuery.get_shipcall_post(schemaModel) # refactored variant of create_sql_query_shipcall_post (more concise)
+        schemas = execute_sql_query_standalone(query=query, param=schemaModel, command_type="execute", pooledConnection=pooledConnection)
+        assert schemas==1, f"unsuccessful query execution. Query: {query}"
+
+        # 2.) obtain the ID of the novel shipcall
+        # within the same pooledConnection, ask for the last inserted id
+        query = SQLQuery.get_shipcall_post_last_insert_id()
+        new_id = commands.execute_scalar(query)
+        assert new_id > 0, f"the new id should be unlike 0.."
+
+        # 3.) read the ShipcallParticipantMap for the novel id
+        query = SQLQuery.get_shipcall_participant_map_by_shipcall_id()
+        pdata = execute_sql_query_standalone(query=query, param={"id" : new_id}, command_type="query") # existing list of assignments
+        assert len(pdata)==0, f"as the POST query does not include participants in this case, the novel id should not have assigned participants."
+
+        ### proxy data ###
+        # loop across passed participant ids, creating entries for those not present in pdata
+        schemaModel = {'id': new_id, "participants":[{'id': 128, 'participant_id': 2, 'type': 4}, {'id': 129, 'participant_id': 3, 'type': 1}, {'id': 130, 'participant_id': 4, 'type': 2}, {'id': 131, 'participant_id': 6, 'type': 8}]}
+
+        # 4.) assign the participants
+        for participant_assignment in schemaModel["participants"]:
+            found_participant = False
+            for elem in pdata:
+                if elem["participant_id"] == participant_assignment["participant_id"] and elem["type"] == participant_assignment["type"]:
+                    found_participant = True
+                    break
+            if not found_participant:
+                nquery = SQLQuery.get_shipcall_post_update_shipcall_participant_map()
+                ndata = execute_sql_query_standalone(query=nquery, param={"shipcall_id" : new_id, "participant_id" : participant_assignment["participant_id"], "type" : participant_assignment["type"]}, command_type="execute") # existing list of assignments
+
+        # 5.) verify the update (5 participants, including the false one)
+        query = SQLQuery.get_shipcall_participant_map_by_shipcall_id()
+        pdata = execute_sql_query_standalone(query=query, param={"id" : new_id}, command_type="query") # existing list of assignments
+        assert len(pdata)==5, f"due to the PUT, there shall now be five participants, as defined in schemaModel."
+
+        # 6.) delete the incorrect participant (last entry in the list in this case)
+        dquery = SQLQuery.get_shipcall_participant_map_delete_by_id()
+        ddata = execute_sql_query_standalone(query=dquery, param={"existing_id" : pdata[-1].get("id")}, command_type="execute")
+
+        # 7.) verify the update (now 4 participants)
+        query = SQLQuery.get_shipcall_participant_map_by_shipcall_id()
+        pdata = execute_sql_query_standalone(query=query, param={"id" : new_id}, command_type="query") # existing list of assignments
+        assert len(pdata)==4, f"due to the PUT, there shall now be five participants, as defined in schemaModel."
+
+    finally:
+        pooledConnection.close()
+    return
+
+def test_sql_query_get_shipcalls_is_identical_to_legacy_query():
+    from BreCal.database.sql_queries import create_sql_query_shipcall_get
+
+    options = {'past_days':7}
+    query_refactored = SQLQuery.get_shipcalls(options)
+    query_legacy = create_sql_query_shipcall_get(options)
+
+    assert query_refactored == query_legacy, f"the refactored code to generate the query must be absolutely identical to the legacy version"
+    return
+
+def test_sql_query_post_ship_is_identical_to_legacy_query():
+    from BreCal.database.sql_queries import SQLQuery, create_sql_query_ship_post, create_sql_query_ship_put
+    from BreCal.stubs.ship import get_stub_valid_ship_loaded_model
+
+    schemaModel = get_stub_valid_ship_loaded_model()
+
+    query_refactored = SQLQuery.get_ship_post(schemaModel)
+    query_legacy = create_sql_query_ship_post(schemaModel)
+
+    assert query_refactored == query_legacy, f"the refactored code to generate the query must be absolutely identical to the legacy version"
+    return
+
+def test_sql_query_put_ship_is_identical_to_legacy_query():
+    from BreCal.database.sql_queries import SQLQuery, create_sql_query_ship_post, create_sql_query_ship_put
+    from BreCal.stubs.ship import get_stub_valid_ship_loaded_model
+
+    schemaModel = get_stub_valid_ship_loaded_model()
+    query_refactored = SQLQuery.get_ship_put(schemaModel)
+    query_legacy = create_sql_query_ship_put(schemaModel)
+
+    assert query_refactored == query_legacy, f"the refactored code to generate the query must be absolutely identical to the legacy version"
+    return
+
+
+
 #schemas = execute_sql_query_standalone(query=SQLQuery.get_berth(), param={})