like dual table in oracle what is the table for ms access

Jun 22 2010 2:46 AM

hai,
this is koti i want to know the dual table for ms access and i send my query for all
but it cant work it will work independently any one sugges solution
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select April_Value - (select April_Value from Sal_Wages_Detail where deductee_id=1246 and Item_Category=2) from Sal_Wages_Detail where deductee_id=1246 and Item_Category=1