Sql 如何根据fetch cteTable更新特定字段

我想根据cteTable的结果替换DATEADD函数中的第一个和第二个参数。这可能吗？我需要创建一个参数吗？先谢谢你。新年快乐

;with cteDP as(
SELECT CODE, MEASSUREMENT, DEFEXPIRYDATEDAYS,
CASE WHEN MEASSUREMENT = 0 THEN 'DAY'
    WHEN MEASSUREMENT = 1 THEN 'WEEK'
    WHEN MEASSUREMENT = 2 THEN 'MONTH'
    WHEN MEASSUREMENT = 3 THEN 'YEARS'
    ELSE 'SECOND' 
    END AS MEASUREMENTINWORD
FROM PW001C06 C06 WHERE CODE IN ('ADC','MMC')
)
select * from cteDP

UPDATE P05
SET     P05.EXPIRYDATE =  CASE  
                        WHEN P05.CODE = 'ADC' THEN DATEADD('cteDocProperties.MEASUREMENTINWORD', @2nd parameter, EXPIRYDATE) 
                       -- WHEN P05.CODE = 'MMC' THEN DATEADD(YEAR, 4, EXPIRYDATE) 
                       -- WHEN P05.CODE = 'LD00' THEN DATEADD(YEAR, 3, EXPIRYDATE) 
                        ELSE EXPIRYDATE
                    END 
FROM   PW001P05 P05
       INNER JOIN cteDP
         ON cteDP.CODE = P05.CODE
WHERE  P05.PIN = 1
       AND P05.CODE IN ('ADC','MMC')

---

您可以直接将联接到表表达式：

UPDATE P05
SET     
    P05.EXPIRYDATE =  CASE  
                        WHEN P05.CODE = 'ADC' THEN 
                           CASE WHEN MEASUREMENTINWORD = 'SECOND' 
                              THEN DATEADD(SECOND, MEASSUREMENT, EXPIRYDATE) 
                           CASE WHEN MEASUREMENTINWORD = 'DAY' 
                              THEN DATEADD(DAY, MEASSUREMENT, EXPIRYDATE) 
                           CASE WHEN MEASUREMENTINWORD = 'MONTH' 
                              THEN DATEADD(MONTH, MEASSUREMENT, EXPIRYDATE) 
                           CASE WHEN MEASUREMENTINWORD = 'YEAR' 
                              THEN DATEADD(YEAR, MEASSUREMENT, EXPIRYDATE) 
                           ELSE EXPIRYDATE
                       END 
FROM   PW001P05 P05
INNER JOIN 
(
   SELECT 
      CODE
      , MEASSUREMENT
      , DEFEXPIRYDATEDAYS
      , CASE 
           WHEN MEASSUREMENT = 0 THEN 'DAY'
           WHEN MEASSUREMENT = 1 THEN 'WEEK'
           WHEN MEASSUREMENT = 2 THEN 'MONTH'
           WHEN MEASSUREMENT = 3 THEN 'YEARS'
           ELSE 'SECOND' 
        END AS MEASUREMENTINWORD
   FROM PW001C06 C06 WHERE CODE IN ('ADC','MMC')
) cteDP
   ON cteDP.CODE = P05.CODE
WHERE  P05.PIN = 1
       AND P05.CODE IN ('ADC','MMC')

---

我也这么想。嵌套的case语句将完成这项工作。我有20多个代码需要更新。DEFEXPIRYDATEDAYS字段还用于显示年/日/月的数量。所以有3个条件，1个表示代码，1个表示日/月/年，1个表示数量。有没有办法让它正常化？谢谢。@Arvinjohnsalandan其他代码背后的逻辑是什么？它与

code='ADC'

的代码相比有什么不同吗？它与其他代码相同。只要大声想一想，这是可以正常化还是可以循环，这样脚本就可以短得多。@arvinjohnsalandan您最好的选择是像上面这样的查询。

WHILE

循环可能较短，但性能较差。