在一个更新语句中 in 一个当前表的子查询 会出现错误 You can’t specify target table for update in FROM clause
解决方法: 在子查询外包裹一个 查询语句 SELECT a.id FROM (子查询)a
UPDATE users_address
SET is_default = 1
WHERE
id IN (
SELECT
a.id
FROM
(
SELECT
max(id) AS id
FROM
`users_address`
GROUP BY
uid
) a
)