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:

Contacts_table = Contacts.metadata.tables["Contacts"]

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(Contacts_table.insert(), {"Discount": "John Doe", "Name": "John Doe"})

Update

The following example modifies an existing record in the table:

session.execute(Contacts_table.update().where(Contacts_table.c.ContactId == "c27221d7-8290-4204-9f3d-0cfb7c5a3d6f").values(Discount="John Doe", Name="John Doe"))

Delete

The following example removes an existing record from the table:

session.execute(Contacts_table.delete().where(Contacts_table.c.ContactId == "c27221d7-8290-4204-9f3d-0cfb7c5a3d6f"))