SQL 中的案例语句使用 Like

Question

Hello I have a SQL statement

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

Even though CalendarName has values like Quarterly (EOM) I still end up getting 0. Any ideas and suggestions!

Answer 1

For one, I would update your SQL to this so you are using a JOIN on your SELECT statement instead of placing this in a WHERE clause.

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

two, what happens if you remove the INSERT INTO ?

Answer 2

You can also do like this. I think this will work.

select *
from table
where columnName like '%' + case when @varColumn is null then '' else @varColumn end  +  ' %'

Answer 3

1. Try ruling-out any null issues with ISNULL():

2. Try ruling-out any case-sensitivity issues with UPPER():

   CASE WHEN upper(isnull(EmpowerCalendarCode.CalendarName, 'none')) LIKE '%MONTHLY%' THEN 3...