sql求优化
SELECT a.node, a.nodename, a.chanid, b.isPTZ,c.dvrPort,o.OrgCode,d.id FROM B AS a LEFT JOIN B AS b ON a.chanId = b.ID
LEFT JOIN C AS c ON b.DvrID = c.ID
LEFT JOIN D o on o.id = c.orgid
LEFT JOIN E d on d.vischanno = b.channo and b.channo !='' and b.channo is not null
where a.chanGroupId in (13673,13674,13887,1376113，……)

where in 这个里面有很多（100个以上），之前我是传了一个一维数组进去查询，但是这样查询速度很慢，请优化方法。

[解决办法]

SQL code

SELECT  a.node ,        a.nodename ,        a.chanid ,        b.isPTZ ,        c.dvrPort ,        o.OrgCode ,        d.idFROM    B AS a        LEFT JOIN B AS b ON a.chanId = b.ID        LEFT JOIN C AS c ON b.DvrID = c.ID        LEFT JOIN D o ON o.id = c.orgid        LEFT JOIN E d ON d.vischanno = b.channo                         AND b.channo != ''                         AND b.channo IS NOT NULLWHERE   a.chanGroupId IN ( 13673, 13674, 13887, 1376113 ) --这里如果有1000个以上，不如LZ再建立一张表（建好索引），用exists判断一下即可。--chanGroupId 也建好索引即可。