TSQL - 如何使用2列的case语句？

Question

我想对2列的结果做一个案例.我该怎么做呢？

例如:

SELECT CASE amount=100 AND DATE IS NOT NULL WHEN 0 THEN 'Something' ELSE ''

那样的东西？

Answer 1

select case
    when amount = 100 and date is not null then 'something'
    else 'something else'
    end

这是一个"搜索过的案例表达"(参见MSDN):

    CASE
      WHEN Boolean_expression THEN result_expression [ ...n ] 
      [ ELSE else_result_expression ]  END

Answer 2

select someColumnName,
       case 
         when amount = 100  AND someothercondition then 'XXX'
         when amount = 1000  AND anothercondition then 'YYY'
         else 'WWW' 
       end as "MyColumnName"
from myTable