>Hi,
>I would like to create a SQL Server command that would set a column to a value and at the same time set the value before the change.
>
>For example, say I have a table PartTable and I want to update the value of column INSTOCK to some value of the variable @StockQty but first set the value of this column to another variable, @StockQtyBeforeChange. This is the UPDATE part of the desired statement:
>
>

>update PartTable set instock = @StockQty where inv_code = @InvCode
>

>
>but I cannot see how to add the following into the statement above:
>
>

>select @StockQtyBeforeChange = instock from PartTable where inv_code = @InvCode
>

>
>Is it possible to do what I am thinking? TIA

Look into OUTPUT clause for UPDATE command in order to set variables of before and after values (Deleted and Inserted tables).