mysql查询内连接问题

Question

我可以执行此查询吗？如果不能，我怎样才能将其更改为工作

SELECT
    clientinfo.clientname, clientinfo.clientcode, clientinfo.serverid,
    serverslist.servername
FROM clientinfo 
where clientinfo.clientjurisdiction='$groupid' && clientinfo.clientcode REGEXP '$expression' 

INNER JOIN 
serverslist ON clientinfo.serverid=serverslist.serverid 
ORDER BY clientinfo.clientcode 

Answer 1

您必须将 INNER JOIN 移动到 FROM 子句中，如下所示:

SELECT c.clientname, c.clientcode, c.serverid, s.servername 
FROM clientinfo c INNER JOIN serverslist s ON c.serverid=s.serverid
WHERE c.clientjurisdiction='$groupid' && c.clientcode REGEXP '$expression' 
ORDER BY c.clientcode