使用Like的SQL中的Case语句

Question

你好我有一个SQL语句

INSERT INTO Foundation.TaxLiability.EmpowerSystemCalendarCode

SELECT SystemTax.SystemTaxID,
       EmpowerCalendarCode.CalendarCodeID
      ,CASE WHEN  EmpowerCalendarCode.CalendarName LIKE '%Monthly%' THEN 3
            WHEN  EmpowerCalendarCode.CalendarName LIKE '%Annual%' THEN 2
            WHEN  EmpowerCalendarCode.CalendarName LIKE '%Quarterly%' THEN 4
       ELSE 0
       END
       FROM Foundation.Common.SystemTax SystemTax, Foundation.TaxLiability.EmpowerCalendarCode EmpowerCalendarCode
WHERE SystemTax.EmpowerTaxCode = EmpowerCalendarCode.LongAgencyCode and SystemTax.EmpowerTaxType = EmpowerCalendarCode.EmpowerTaxType

即使CalendarName具有像Quarterly(EOM)这样的值,我仍然得到0.任何想法和建议!

Answer 1

首先,我会将您的SQL更新为此,因此您JOIN在SELECT语句中使用a 而不是将其放在WHERE子句中.

INSERT INTO Foundation.TaxLiability.EmpowerSystemCalendarCode

SELECT SystemTax.SystemTaxID,
       EmpowerCalendarCode.CalendarCodeID
      ,CASE WHEN  EmpowerCalendarCode.CalendarName LIKE '%Monthly%' THEN 3
            WHEN  EmpowerCalendarCode.CalendarName LIKE '%Annual%' THEN 2
            WHEN  EmpowerCalendarCode.CalendarName LIKE '%Quarterly%' THEN 4
       ELSE 0
       END
FROM Foundation.Common.SystemTax SystemTax
INNER JOIN Foundation.TaxLiability.EmpowerCalendarCode EmpowerCalendarCode
    ON SystemTax.EmpowerTaxCode = EmpowerCalendarCode.LongAgencyCode 
    AND SystemTax.EmpowerTaxType = EmpowerCalendarCode.EmpowerTaxType

二,如果你删除会发生什么INSERT INTO？