string whereDEL_R = "R." + col1 + "," + "R." + col2; string whereDEL_X = "X." + col1 + "," + "X." + col2;string strSql_DEL = "delete from " + repTN + " where (" + whereDEL_R + ")" + " not in (select " + whereDEL_X + " from " + xbbTN + ")";…