Compare this Clause Element to the given Clause Element.
Unlike stored procedures (which also support parameters), these parameterized functions can be updateable, as you'll see later in this chapter.CTEs can also be applied to DML constructs UPDATE, INSERT and DELETE on some databases, both as a source of CTE rows when combined with RETURNING, as well as a consumer of CTE rows. This is used to support backend-specific prefix keywords such as those provided by My SQL.SQLAlchemy detects Add one or more expressions following the statement keyword, i.e. E.g.: Upon compilation, a RETURNING clause, or database equivalent, will be rendered within the statement.In the image below we see where we create our example table named tbl Trigger Test with a primary key column named pk ID, a date column named Order Approval Date Time and a varchar column named Order Status.We populate the table with three test records with the Order Approval Date Time set to NULL and the Order Status set to "Pending".FOR UPDATE clause to indicate to the database, that a set of cells or records should be locked by a given transaction for subsequent updates.