mysql - 使用 JOIN 命令更新记录

Question

我有以下查询，效果很好，并显示 tbl_staff.staff_id 和 tbl_lead.rlog_create_user_id 值不匹配的位置。

    SELECT
tbl_staff.staff_id,
tbl_staff.username,
tbl_lead.rlog_create_user_name,
tbl_lead.rlog_create_user_id
    FROM
    tbl_staff
    JOIN tbl_lead ON tbl_staff.username = tbl_lead.rlog_create_user_name
    AND tbl_staff.staff_id <> tbl_lead.rlog_create_user_id;

查询返回如下值，您可以看到 1014 与 1004 不匹配。

1014    bubba   bubba   1004

我想将 tbl_lead.rlog_create_user_id 中的值更新为与 tbl_staff.staff_id 中找到的值相同。

我尝试插入 SET 命令，但它给了我一个一般语法错误:

        SELECT
    tbl_staff.staff_id,
    tbl_staff.username,
    tbl_lead.rlog_create_user_name,
    tbl_lead.rlog_create_user_id
        FROM
        tbl_staff
        JOIN tbl_lead ON tbl_staff.username = tbl_lead.rlog_create_user_name
        AND tbl_staff.staff_id <> tbl_lead.rlog_create_user_id
SET tbl_lead.rlog_create_user_id=tbl_staff.staff_id ;

实际错误是:

[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SET tbl_lead.rlog_create_user_id=tbl_staff.staff_id' at line 10

我尝试使用此问题将 SELECT 更改为和 UPDATE 命令，但仍然无法使其工作:How can I do an UPDATE statement with JOIN in SQL?

Answer 1

试试这个

UPDATE tbl_lead
JOIN tbl_staff ON tbl_staff.username = tbl_lead.rlog_create_user_name
SET tbl_lead.rlog_create_user_id = tbl_staff.staff_id 
WHERE tbl_staff.staff_id <> tbl_lead.rlog_create_user_id;