Microsoft® SQL Server 2012 Unleashed

Using inserted and deleted Tables

In most trigger situations, you need to know what changes were made as part of the data modification. You can find this information in the inserted and deleted tables. For the AFTER trigger, these temporary memory-resident tables contain the rows modified by the statement. With the INSTEAD OF trigger, the inserted and deleted tables are actually temporary tables created on-the-fly.

The inserted and deleted tables have identical column structures and names as the tables that were modified. Consider running the following statement against the AdventureWorks2012 database:

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UPDATE [Production].[Product] SET [ListPrice] = '10' WHERE ProductSubcategoryID = 23

When this statement is executed, ...