SQL文优化
select PROD_ID,
       PROD_NAME,
       DEPT_ID,
       SAL_PRICE,
       STOCK_AMOUNTS,
       MINI_PO,
       SPECIFICATION,
       case '6942836701321'
         when PROD_BARCODE1 then
          PKG_SIZE1
         when PROD_BARCODE2 then
          PKG_SIZE2
         when PROD_BARCODE3 then
          PKG_SIZE3
         when PROD_BARCODE4 then
          PKG_SIZE4
         when PROD_BARCODE5 then
          PKG_SIZE5
         when PROD_BARCODE6 then
          PKG_SIZE6
       end as PKG_SIZEE
  from ST_Product_Master
 where '6942836701321' in(PROD_BARCODE1,PROD_BARCODE2,PROD_BARCODE3,PROD_BARCODE4,PROD_BARCODE5,PROD_BARCODE6)
帮忙看看这段sql怎么能优化下，提高SQL的运行速度？
------解决方案--------------------
 where '6942836701321' in(PROD_BARCODE1,PROD_BARCODE2,PROD_BARCODE3,PROD_BARCODE4,PROD_BARCODE5,PROD_BARCODE6)

'6942836701321' 这个是列名？？？？？
------解决方案--------------------
改成这样试试：

select PROD_ID,

       PROD_NAME,

       DEPT_ID,

       SAL_PRICE,

       STOCK_AMOUNTS,

       MINI_PO,

       SPECIFICATION,

       case '6942836701321'

         when PROD_BARCODE1 then

          PKG_SIZE1

         when PROD_BARCODE2 then

          PKG_SIZE2

         when PROD_BARCODE3 then

          PKG_SIZE3

         when PROD_BARCODE4 then

          PKG_SIZE4

         when PROD_BARCODE5 then

          PKG_SIZE5

       &n