Question

我想对2列的结果做一个案例。我该怎么做？

e.g：

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”（see 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

Answer 3

select 
case 
    when 
        amount = 100 
        and date is not null    
    then 
        '0'
    else 
        'something else'
end

Answer 4

寻找SELECT WHEN

http://www.4guysfromrolla.com/webtech/102704-1.shtml

Answer 5

选择金额= 100且日期不为空的情况，然后选择'某事'其他'某事当amount = 0时，'something else'以MyColumnName结尾

TSQL - 如何使用2列的case语句？

5 个答案: