Question

SELECT userid, name
FROM users 
WHERE nationality="US" 
ORDER BY name

假设我希望首先显示userid=101和nationality="US“的用户，无论如何都要显示，并且使用一个查询进行此操作非常重要。

Answer 1

尝试FIELD

SELECT userid, name FROM users WHERE nationality="US" ORDER BY FIELD(user_id,101) DESC, name asc

Field Documentation

Answer 2

试试这个：

SELECT * FROM (
    SELECT userid, name, IF(user = 101, 1 , 2) AS rank 
    FROM users WHERE nationality = "US"
) AS subselect ORDER BY subselect.rank ASC, subselect.name ASC

Answer 3

或者你可以这样做：

SELECT userid, name, (userid=101) AS test FROM users WHERE nationality="US" ORDER BY test DESC, name ASC

MySQL选择首先显示具有特定值的行

3 个答案: