sql 嵌套 case 语句

发布于 2024-09-08 08:33:27 字数 865 浏览 5 评论 0原文

有谁知道这个嵌套的 select 语句有什么问题吗？它抱怨缺少 ) ，但我不明白为什么它不起作用（我省略了声明的其他部分）

Select
(CASE WHEN REQUESTS.grade_id = 1 THEN
      (CASE WHEN  ((date_completed-date_submitted)*24*60)<=30 THEN 'Yes'
           ELSE 'No'
      END)
 ELSE CASE WHEN REQUESTS.grade_id = 2 THEN
      (CASE ((date_completed-date_submitted)*24*60) <=120 THEN 'Yes'
           ELSE 'No'
      END) 
 ELSE CASE WHEN REQUESTS.grade_id = 3 THEN
     (CASE ((date_completed-date_submitted)*24*60)<=14400 THEN 'Yes'
          ELSE 'No'
     END)
 END)in_SLA

如果我这样做

    Select
       (CASE WHEN REQUESTS.grade_id = 1 THEN
           (CASE WHEN  ((date_completed-date_submitted)*24*60)<=30 THEN 'Yes'
               ELSE 'No'
            END)
       END) in_sla

它就可以正常工作！

非常感谢任何帮助，

抱歉

，我迟到了，我错过了嵌套案例中的时间

原文

does anyone know whats wrong with this nested select statement? It complains about missing )'s but i can't understand why it doesn't work (i have left off the other bits of the statement)

Select
(CASE WHEN REQUESTS.grade_id = 1 THEN
      (CASE WHEN  ((date_completed-date_submitted)*24*60)<=30 THEN 'Yes'
           ELSE 'No'
      END)
 ELSE CASE WHEN REQUESTS.grade_id = 2 THEN
      (CASE ((date_completed-date_submitted)*24*60) <=120 THEN 'Yes'
           ELSE 'No'
      END) 
 ELSE CASE WHEN REQUESTS.grade_id = 3 THEN
     (CASE ((date_completed-date_submitted)*24*60)<=14400 THEN 'Yes'
          ELSE 'No'
     END)
 END)in_SLA

If i just do

    Select
       (CASE WHEN REQUESTS.grade_id = 1 THEN
           (CASE WHEN  ((date_completed-date_submitted)*24*60)<=30 THEN 'Yes'
               ELSE 'No'
            END)
       END) in_sla

It works fine!

any help is much appreciated

sorry being a tard i'm missing the whens from the nested cases

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掐死时间 2024-09-15 08:33:27

它应该是：

Select
(CASE WHEN REQUESTS.grade_id = 1 THEN
      (CASE WHEN  ((date_completed-date_submitted)*24*60)<=30 THEN 'Yes'
           ELSE 'No'
      END)
      WHEN REQUESTS.grade_id = 2 THEN
      (CASE ((date_completed-date_submitted)*24*60) <=120 THEN 'Yes'
           ELSE 'No'
      END) 
      WHEN REQUESTS.grade_id = 3 THEN
     (CASE ((date_completed-date_submitted)*24*60)<=14400 THEN 'Yes'
          ELSE 'No'
     END)
 END)in_SLA

即每种情况只是“WHEN”而不是“ELSE CASE WHEN”。

我很想简化为：

Select
CASE WHEN (REQUESTS.grade_id = 1 AND (date_completed-date_submitted)*24*60 <= 30)
       OR (REQUESTS.grade_id = 2 AND (date_completed-date_submitted)*24*60 <=120)
       OR (REQUESTS.grade_id = 3 AND (date_completed-date_submitted)*24*60 <=14400)
     THEN 'Yes'
     ELSE 'No'
 END in_SLA

It should be:

Select
(CASE WHEN REQUESTS.grade_id = 1 THEN
      (CASE WHEN  ((date_completed-date_submitted)*24*60)<=30 THEN 'Yes'
           ELSE 'No'
      END)
      WHEN REQUESTS.grade_id = 2 THEN
      (CASE ((date_completed-date_submitted)*24*60) <=120 THEN 'Yes'
           ELSE 'No'
      END) 
      WHEN REQUESTS.grade_id = 3 THEN
     (CASE ((date_completed-date_submitted)*24*60)<=14400 THEN 'Yes'
          ELSE 'No'
     END)
 END)in_SLA

i.e. just "WHEN" not "ELSE CASE WHEN" for each case.

I'd be tempted to simplify to:

Select
CASE WHEN (REQUESTS.grade_id = 1 AND (date_completed-date_submitted)*24*60 <= 30)
       OR (REQUESTS.grade_id = 2 AND (date_completed-date_submitted)*24*60 <=120)
       OR (REQUESTS.grade_id = 3 AND (date_completed-date_submitted)*24*60 <=14400)
     THEN 'Yes'
     ELSE 'No'
 END in_SLA

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