Modifying existing values

This example uses the Cars Table from the Example Databases.

UPDATE Cars
SET TotalCost = TotalCost + 100
WHERE Id = 3 or Id = 4

Update operations can include current values in the updated row. In this simple example the TotalCost is incremented by 100 for two rows:

• The TotalCost of Car #3 is increased from 100 to 200
• The TotalCost of Car #4 is increased from 1254 to 1354

A column’s new value may be derived from its previous value or from any other column’s value in the same table or a joined table.