Question

这是我的SQL查询：

SELECT *
,CASE WHEN (ETA>10 OR Class='EOL') THEN 'Eligible' ELSE 'Not Applicable' END AS Eligible
FROM XYZtable

结果是：

PN  PD  ETA Class   BU  Serial  Comm    frmToday    Eligible
CX  CRD 03-10   IP  07  2322    CARD    3   Not Applicable
BX  CRD 03-18   IP  05  2324    CARD    11  Eligible
MX  CRD 03-10   EOL 07  2325    CARD    3   Not Applicable

我想在Eligible列中提及以下结果：

If ETA > 10 THEN 'Eligible'
If Class = 'EOL' THEN 'Consult Plz'
Else 'Not Applicable'

感谢。

Answer 1

SELECT *,
      CASE WHEN ETA>10 THEN 'Eligible' 
      WHEN Class = 'EOL' THEN 'Consult Plz' 
      ELSE 'Not Applicable' END AS Eligible
FROM XYZtable

Answer 2

CASE 
    WHEN <condition> THEN <value>
    WHEN <condition> THEN <value>
    WHEN <condition> THEN <value>
    WHEN <condition> THEN <value>
    ELSE <value>
END

或者如果你需要筑巢，你可以

CASE 
    WHEN <condition> THEN 
        CASE <othercondition> THEN <value>
        ELSE <othervalue> END
END

在CASE，

中

CASE 
    WHEN ETA > 10 
        THEN 'Eligible' 
    WHEN Class = 'EOL' 
        THEN 'Consult Plz'
    ELSE 'Not Applicable' 
END

如何在SQL的CASE STATEMENT中放入三个条件？

2 个答案: