["python","sqlalchemy"]
sqlalchemy IS NOT NULL select

How can I add the filter as in SQL to select values that are NOT NULL from a certain column ? SELECT * FROM table WHERE YourColumn IS NOT NULL; How can I do the same with SQLAlchemy filters? select = select(table).select_from(table).where(all_filters)
column_obj != None will produce a IS NOT NULL constraint: In a column context, produces the clause a != b. If the target is None, produces a IS NOT NULL. or use is_not()*: Implement the IS NOT operator. Normally, IS NOT is generated automatically when comparing to a value of None, which resolves to NULL. However, explicit usage of IS NOT may be desirable if comparing to boolean values on certain platforms. Demo: >>> from sqlalchemy.sql import column >>> column('YourColumn') != None <sqlalchemy.sql.elements.BinaryExpression object at 0x10f81aa90> >>> print(column('YourColumn') != None) "YourColumn" IS NOT NULL >>> column('YourColumn').is_not(None) <sqlalchemy.sql.elements.BinaryExpression object at 0x11081edf0> >>> print(column('YourColumn').is_not(None)) "YourColumn" IS NOT NULL You can't use is not None here, because the is not object identity inequality test can't be overloaded the way != can; you'll just get True instead as a ColumnClause instance is not the same object as the None singleton: >>> column('YourColumn') is not None True *) The method was formerly named isnot() and was renamed in SQLAlchemy 1.4. The old name is still available for backwards compatibility.