标签：span where 数据 gpo class col number body style
SELECT 查询字段 AS 取别名FROM 表a aLEFT JOIN 表b b ON b.id = a.idWHERE a.number ORDER BY b.id LIMIT 1
数据库中表关联查询
原文地址：http://www.cnblogs.com/jiaoyang77/p/8028680.html
