Question

以下表达式无法正常工作，实际上我想基于以下条件使用案例

更新sal和desg

SELECT SAL,
CASE SAL  WHEN     SAL BETWEEN 3000 AND 5000 THEN SAL=SAL+(0.2*SAL) AND DESG='DEO'
          WHEN     SAL BETWEEN 5001 AND 7000 THEN SAL=SAL+(.15*SAL) AND DESG='ENGNRR'
          WHEN     SAL  BETWEEN 7001 AND 10000 THEN SAL=SAL+(0.25*SAL) AND DESG='SSE'
          WHEN     SAL >1000 THEN SAL=SAL +(0.15*SAL) AND DESG='PSE'
              `    `ELSE SAL=SAL+1500 AND DESG='TL'
              END 
               FROM SAMPLES

我的表名是样本

Answer 1

首先，您需要UPDATE个名称来更新sal。

THEN之后的Secon只能是一个表达式，而不是AND个比较器。如果要创建两列，则需要使用两个CASE expresion

SELECT SAL,
       CASE WHEN SAL BETWEEN 3000 AND 5000 THEN SAL+(0.2*SAL)   -- == SAL * 1.2
            WHEN SAL BETWEEN 5001 AND 7000 THEN SAL+(.15*SAL)   -- == SAL * 1.15
            WHEN SAL BETWEEN 7001 AND 10000 THEN SAL+(0.25*SAL) -- == SAL * 1.25
            WHEN SAL > 1000 THEN SAL +(0.15*SAL)                -- == SAL * 1.15
            ELSE SAL+1500
       END as newSal,
       CASE WHEN SAL BETWEEN 3000 AND 5000 THEN 'DEO'
            WHEN SAL BETWEEN 5001 AND 7000 THEN 'ENGNRR'
            WHEN SAL BETWEEN 7001 AND 10000 THEN 'SSE'
            WHEN SAL > 1000 THEN 'PSE'
            ELSE 'TL'
       END as newDSG
FROM SAMPLES;

此外，您不需要CASE上的值，您需要并更新

UPDATE SAMPLES
SET SAL = CASE WHEN SAL BETWEEN 3000 AND 5000 THEN SAL+(0.2*SAL) 
               WHEN SAL BETWEEN 5001 AND 7000 THEN SAL+(.15*SAL)
               WHEN SAL BETWEEN 7001 AND 10000 THEN SAL+(0.25*SAL)
               WHEN SAL > 1000 THEN SAL +(0.15*SAL)
               ELSE SAL+1500
          END,
DESG = CASE WHEN SAL BETWEEN 3000 AND 5000 THEN 'DEO'
            WHEN SAL BETWEEN 5001 AND 7000 THEN 'ENGNRR'
            WHEN SAL BETWEEN 7001 AND 10000 THEN 'SSE'
            WHEN SAL > 1000 THEN 'PSE'
            ELSE 'TL'
       END;

Answer 2

UPDATE SAMPLES
SET SAL  = CASE WHEN SAL BETWEEN 3000 AND 5000  THEN SAL*1.2
                WHEN SAL > 5000 AND SAL <= 7000 THEN SAL*1.15
                WHEN SAL > 7000 AND SAL <=10000 THEN SAL*1.25
                WHEN SAL >10000                 THEN SAL*1.15
                                                ELSE SAL+1500
                END,
   DESG = CASE WHEN SAL BETWEEN 3000 AND 5000  THEN 'DEO'
               WHEN SAL > 5000 AND SAL <= 7000 THEN 'ENGNRR'
               WHEN SAL > 7000 AND SAL <=10000 THEN 'SSE'
               WHEN SAL >10000                 THEN 'PSE'
                                               ELSE 'TL'
               END;

Oracle案例功能

2 个答案: