在where子句中使用select語句內的情況。流汗錯誤ORA-00905

Question

我的示例代碼。

在where條件裏的case語句，而我等同於變量，我得到以下錯誤：

ORA-00905缺失關鍵字

我不瞭解我出錯的地方。

我甚至嘗試完全等同case語句的變量，它沒有得到所需的輸出。

任何人都可以幫助我嗎？

SELECT JOB_NAME, 
     HOURS, 
     COMMITTEE, 
     REPORT, 
     DIRECTOR, 
     (CASE 
     WHEN L.ACTION IN ('110', '10') AND 
       L.APPROVED = 'Y' AND 
       (:LV_ACTN = '1' OR :LV_ACTN = '4') THEN 
      L.APPRV_JUSTIFY 
     WHEN L.ACTION IN ('20', '130') AND 
       L.FLAG = 'R' AND (:LV_ACTN = '2' OR :LV_ACTN = '4') THEN 
      L.CANCL_JUSTIFY 
     WHEN L.ACTION IN ('30', '120') AND 
       L.APPROVED = 'Y' AND 
       (:LV_ACTN = '3' OR :LV_ACTN = '4') THEN 
      L.POSTPONE_JUSTIFY 
     ELSE 
      'NO ACTION' 
     END) AS EXPLANATION, 
     L.ID, 
     MANAGER, 
     l.year 
    FROM PLAN L 
WHERE (CASE WHEN 
     L.ACTION IN ('110', '10') AND 
       L.APPROVED = 'Y' AND 
       (:LV_ACTN = '1' OR :LV_ACTN = '4') THEN 'X' 
     WHEN L.ACTION IN ('20', '130') AND 
       L.FLAG = 'R' AND (:LV_ACTN = '2' OR :LV_ACTN = '4') THEN 'X' 
     WHEN L.ACTION IN ('30', '120') AND 
       L.APPROVED = 'Y' AND 
       (:LV_ACTN = '3' OR :LV_ACTN = '4') THEN X' END) IS NOT NULL 
    AND ((case when L.ACTION IN ('30', '120') THEN 
     (SELECT DISTINCT AV.YEAR 
      FROM PLAN_V AV 
      WHERE L.ID = AV.ID 
      AND AV.B_ID = 
       (SELECT MAX(B_ID) 
        FROM MS_AUD_AUDIT_PLAN_V 
        WHERE B_ID < 
         (SELECT MAX(B_ID) 
          FROM PLAN_V 
          WHERE ACTION = '120')))**=:LV_PLANYR** ELSE 
     L.YEAR END)**= :LV_PLANYR**) 

Answer 1

我編輯了你的代碼，並且用stackoverflow的語法高亮顯示，錯誤就變得很明顯。 你就行缺少一個'：

(:LV_ACTN = '3' OR :LV_ACTN = '4') THEN X' END) IS NOT NULL 

好行是：

(:LV_ACTN = '3' OR :LV_ACTN = '4') THEN 'X' END) IS NOT NULL