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Sql to find space occupied by a table in a specific database

          Select
                    Databasename  ,Tablename
                   ,Sum(Currentperm)/(1024*1024*1024)  (Decimal(15,6))  As Table_Size
         From  
                     DBC.Tablesize
        Where Databasename = ‘xyz_db‘
                  And Tablename=’xyz_Table_Name’
        Group By 1,2 ;
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