Commands can be executed individually by the session with a call to "execute()".

Obtaining the Table Object

The query supplied to this method is constructed using the associated Table object of a mapped class. This Table object is obtained from the mapped class's metadata field, as below:

Comments_table = Comments.metadata.tables["Comments"]

Once the table object is obtained, the write operations are executed in the following ways. The queries are executed immediately without the need for a call to "commit()":

Insert

The following example adds a new record to the table:

session.execute(Comments_table.insert(), {"CreatorName": "Old to do", "Text": "New to do"})

Update

The following example modifies an existing record in the table:

session.execute(Comments_table.update().where(Comments_table.c.Id == "123456").values(CreatorName="Old to do", Text="New to do"))

Delete

The following example removes an existing record from the table:

session.execute(Comments_table.delete().where(Comments_table.c.Id == "123456"))