Question

我有一张桌子，我只想用＃34; LIMIT 2＆＃34;选择两行。在那两行我想要应用＆＃34; CASE＆＃34;结果之间有MAX和MIN（2行）。

但它正在选择所有行并应用＆＃34; CASE＆＃34;在所有行中。

我如何只应用这两个结果？

谢谢。

    Table:

        user | offer
        1    | 10
        1    | 10
        2    | 20
        2    | 20


    Query:

        SELECT (case when max(offer) = min(offer)             
                then 'true'             
                else 'false'        
            end) as info
        FROM user
        ORDER BY offer DESC 
        LIMIT 2

Result that I want to have:

result = true

Answer 1

您需要在子查询中使用该限制以满足您的要求。

SELECT (case when max(offer) = min(offer)             
                then 'true'             
                else 'false'        
            end) as info 
  From (Select * FROM user
        ORDER BY offer DESC 
        LIMIT 2)

MYSQL - 最大和最小限制

1 个答案: