SQL的大問題???(編號:4653)

MySql = "SELECT PRODUCT.NAME AS PRODNAME,SUPPLY.NAME,SUPPLY.ADD,SUPPLY.TEL FROM PRODUCT,SUPPLY "
'產品名稱         廠商名稱  廠商地址  廠商電話          
MySql = MySql & "WHERE PRODUCT.ID IN (SELECT PRODID FROM STOCKSUB WHERE PRODID ='" & strSUPPLYSHOW & "',"
進貨單明細                
MySql = MySql & "SUPPLY.ID IN(SELECT SUPID FROM STOCKMAIN WHERE ID IN (SELECT MAINID FROM STOCKSUB WHERE PRODID ='" & strSUPPLYSHOW & "')"
進貨單                             

SQL這樣子寫可以用嗎???