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:

Employee_table = Employee.metadata.tables["Employee"]

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(Employee_table.insert(), {"FirstName": "Jon Doe", "LastName": "John"})

Update

The following example modifies an existing record in the table:

session.execute(Employee_table.update().where(Employee_table.c.EmployeeId == "1234").values(FirstName="Jon Doe", LastName="John"))

Delete

The following example removes an existing record from the table:

session.execute(Employee_table.delete().where(Employee_table.c.EmployeeId == "1234"))