Modifying Data
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:
Orders_table = Orders.metadata.tables["Orders"]
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(Orders_table.insert(), {"DocumentNumber": "Jon Doe", "Revision": "John"})
Update
The following example modifies an existing record in the table:
session.execute(Orders_table.update().where(Orders_table.c.Id == "DO240").values(DocumentNumber="Jon Doe", Revision="John"))
Delete
The following example removes an existing record from the table:
session.execute(Orders_table.delete().where(Orders_table.c.Id == "DO240"))