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:
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"))