mysql按照时间排序去重查询？

Posted 2023-05-04

这是我们的用户登录记录数据表，每次用户登录成功都会产生一条记录。现在就是想按照最后登录时间来排序，列出今天登录的用户。网上试了N中代码，都不好使，求高手支招

参考技术A SELECT
a.uid,
a.time
FROM
(
SELECT
uid,
time
FROM
user_log -- 你的表名
WHERE
time >= UNIX_TIMESTAMP(CURDATE())
) a
LEFT JOIN (
SELECT
uid,
time
FROM
user_log -- 你的表名
WHERE
time >= UNIX_TIMESTAMP(CURDATE())
) b ON a.uid = b.uid
AND a.time < b.time
WHERE
b.uid IS NULL
order by a.time desc

MYSQL 按照字母排序查询

select  id vKey, name vValue from ib_brand order by convert(name USING gbk) COLLATE gbk_chinese_ci asc