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我试图在 CASE 中编写 IF 语句，但这给了我编译错误。这我的代码看起来像

(CASE 
    IF (acc_type_id_ = 'ENDU') THEN
      WHEN PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
      WHEN PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART' 
    ELSE
       WHEN PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
       WHEN PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' THEN '&ACTION_ADD_TO_CART' 
    END IF;   
ELSE '&ACTION_NO_ACTION'
END) ACTION2,

SQLPLUS 中的错误

( begin case declare exit for goto if loop mod null pragma
raise return select update while with <an identifier>
<a double-quoted delimited-identifier> <a bind variable> <<
continue close current delete fetch lock insert open rollback
savepoint set sql execute commit forall merge pipe purge
4

1 回答 1

3

那这个呢？您可以使用acc_type_id_ = 'ENDU'作为WHEN条件的一部分来实现相同的结果。

(CASE 
      WHEN acc_type_id_ = 'ENDU' AND PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
      WHEN acc_type_id_ = 'ENDU' AND PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART' 
      WHEN acc_type_id_ != 'ENDU' AND PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
      WHEN acc_type_id_ != 'ENDU' AND PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' THEN '&ACTION_ADD_TO_CART' 
      ELSE '&ACTION_NO_ACTION'
END) ACTION2,
于 2013-01-06T11:31:20.830 回答