LEFT JOIN ... ON ... 四表联查实例
来源：互联网 发布：excel如何合并数据 编辑：程序博客网 时间：2024/06/06 03:22
记一次用的少且时常忘记的多表联查，不清楚在很多数据时这样的效率怎么样？本人菜鸟一枚，路过的高手可指点一下！THX
SELECT a.itemid,a.catid,a.areaid,a.title,a.hits,a.thumb,a.linkurl,a.address,a.sponsor, b.itemid,b.content, c.catid,c.moduleid, d.moduleid,d.name FROM exhibit AS a left join exhibit_data AS b ON a.itemid=b.itemid left join category AS c ON a.catid=c.catid WHERE a.title LIKE '%北京%' ORDER BY addtime DESC LIMIT 0,10;阅读全文
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- LEFT JOIN ... ON ... 四表联查实例
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