diff --git a/src/database/evaluations.py b/src/database/evaluations.py
index 5dfbc4c..63ea740 100644
--- a/src/database/evaluations.py
+++ b/src/database/evaluations.py
@@ -1,24 +1,27 @@
-from typing import Any, Iterable
+from typing import Sequence, cast
 
 from core.formatting import _str_to_bool
 from schemas.datasets.openml import EstimationProcedure
-from sqlalchemy import Connection, CursorResult, text
+from sqlalchemy import Connection, Row, text
 
 
-def get_math_functions(function_type: str, connection: Connection) -> CursorResult[Any]:
-    return connection.execute(
-        text(
-            """
+def get_math_functions(function_type: str, connection: Connection) -> Sequence[Row]:
+    return cast(
+        Sequence[Row],
+        connection.execute(
+            text(
+                """
             SELECT *
             FROM math_function
             WHERE `functionType` = :function_type
             """,
-        ),
-        parameters={"function_type": function_type},
+            ),
+            parameters={"function_type": function_type},
+        ).all(),
     )
 
 
-def get_estimation_procedures(connection: Connection) -> Iterable[EstimationProcedure]:
+def get_estimation_procedures(connection: Connection) -> list[EstimationProcedure]:
     rows = connection.execute(
         text(
             """
diff --git a/src/database/flows.py b/src/database/flows.py
index 7ed2c1e..4889f13 100644
--- a/src/database/flows.py
+++ b/src/database/flows.py
@@ -1,18 +1,21 @@
-from typing import Any
+from typing import Sequence, cast
 
-from sqlalchemy import Connection, CursorResult, Row, text
+from sqlalchemy import Connection, Row, text
 
 
-def get_flow_subflows(flow_id: int, expdb: Connection) -> CursorResult[Any]:
-    return expdb.execute(
-        text(
-            """
+def get_flow_subflows(flow_id: int, expdb: Connection) -> Sequence[Row]:
+    return cast(
+        Sequence[Row],
+        expdb.execute(
+            text(
+                """
             SELECT child as child_id, identifier
             FROM implementation_component
             WHERE parent = :flow_id
             """,
+            ),
+            parameters={"flow_id": flow_id},
         ),
-        parameters={"flow_id": flow_id},
     )
 
 
@@ -30,16 +33,19 @@ def get_flow_tags(flow_id: int, expdb: Connection) -> list[str]:
     return [tag.tag for tag in tag_rows]
 
 
-def get_flow_parameters(flow_id: int, expdb: Connection) -> CursorResult[Any]:
-    return expdb.execute(
-        text(
-            """
+def get_flow_parameters(flow_id: int, expdb: Connection) -> Sequence[Row]:
+    return cast(
+        Sequence[Row],
+        expdb.execute(
+            text(
+                """
             SELECT *, defaultValue as default_value, dataType as data_type
             FROM input
             WHERE implementation_id = :flow_id
             """,
+            ),
+            parameters={"flow_id": flow_id},
         ),
-        parameters={"flow_id": flow_id},
     )
 
 
diff --git a/src/database/studies.py b/src/database/studies.py
index 8898c10..3c7c166 100644
--- a/src/database/studies.py
+++ b/src/database/studies.py
@@ -1,6 +1,6 @@
 import re
 from datetime import datetime
-from typing import cast
+from typing import Sequence, cast
 
 from schemas.study import CreateStudy, StudyType
 from sqlalchemy import Connection, Row, text
@@ -34,10 +34,10 @@ def get_study_by_alias(alias: str, connection: Connection) -> Row | None:
     ).one_or_none()
 
 
-def get_study_data(study: Row, expdb: Connection) -> list[Row]:
+def get_study_data(study: Row, expdb: Connection) -> Sequence[Row]:
     if study.type_ == StudyType.TASK:
         return cast(
-            list[Row],
+            Sequence[Row],
             expdb.execute(
                 text(
                     """
@@ -50,7 +50,7 @@ def get_study_data(study: Row, expdb: Connection) -> list[Row]:
             ).all(),
         )
     return cast(
-        list[Row],
+        Sequence[Row],
         expdb.execute(
             text(
                 """
diff --git a/src/database/tasks.py b/src/database/tasks.py
index 0226600..69ce220 100644
--- a/src/database/tasks.py
+++ b/src/database/tasks.py
@@ -1,6 +1,6 @@
-from typing import Any, Sequence, cast
+from typing import Sequence, cast
 
-from sqlalchemy import Connection, CursorResult, MappingResult, Row, text
+from sqlalchemy import Connection, Row, text
 
 
 def get_task(task_id: int, expdb: Connection) -> Row | None:
@@ -43,42 +43,51 @@ def get_task_type(task_type_id: int, expdb: Connection) -> Row | None:
     ).one_or_none()
 
 
-def get_input_for_task_type(task_type_id: int, expdb: Connection) -> CursorResult[Any]:
-    return expdb.execute(
-        text(
-            """
+def get_input_for_task_type(task_type_id: int, expdb: Connection) -> Sequence[Row]:
+    return cast(
+        Sequence[Row],
+        expdb.execute(
+            text(
+                """
         SELECT *
         FROM task_type_inout
         WHERE `ttid`=:ttid AND `io`='input'
         """,
-        ),
-        parameters={"ttid": task_type_id},
+            ),
+            parameters={"ttid": task_type_id},
+        ).all(),
     )
 
 
-def get_input_for_task(task_id: int, expdb: Connection) -> MappingResult:
-    return expdb.execute(
-        text(
-            """
+def get_input_for_task(task_id: int, expdb: Connection) -> Sequence[Row]:
+    return cast(
+        Sequence[Row],
+        expdb.execute(
+            text(
+                """
             SELECT `input`, `value`
             FROM task_inputs
             WHERE task_id = :task_id
             """,
-        ),
-        parameters={"task_id": task_id},
-    ).all()
+            ),
+            parameters={"task_id": task_id},
+        ).all(),
+    )
 
 
-def get_task_type_inout_with_template(task_type: int, expdb: Connection) -> CursorResult[Any]:
-    return expdb.execute(
-        text(
-            """
+def get_task_type_inout_with_template(task_type: int, expdb: Connection) -> Sequence[Row]:
+    return cast(
+        Sequence[Row],
+        expdb.execute(
+            text(
+                """
             SELECT *
             FROM task_type_inout
             WHERE `ttid`=:ttid AND `template_api` IS NOT NULL
             """,
-        ),
-        parameters={"ttid": task_type},
+            ),
+            parameters={"ttid": task_type},
+        ).all(),
     )