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:

Invoices_table = Invoices.metadata.tables["Invoices"]

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(Invoices_table.insert(), {"Id": "Jon Doe", "DueDate": "John"})

Update

The following example modifies an existing record in the table:

session.execute(Invoices_table.update().where(Invoices_table.c.Id == "6").values(Id="Jon Doe", DueDate="John"))

Delete

The following example removes an existing record from the table:

session.execute(Invoices_table.delete().where(Invoices_table.c.Id == "6"))