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多表级联，实现功能强大，标题所不能描述，下面有图片
摘要：表brand0:表brand1:想要结合表brand0和表brand1，得到如下结果：解决办法：法1、SELECT brand0.brand_id ,brand0.clickCount,brand1.saleCount FROM brand0 LEFT JOIN brand1 ON brand0.brand_id=brand1.brand_id UNION SELECT brand1.brand_id ,brand0.clickCount,brand1.saleCount FROM brand0 RIGHT JOIN brand1 ON brand1.brand_id=brand0.... 阅读全文
posted @ 2014-03-25 11:12 坤哥MartinLi 阅读(126) 评论(0) 推荐(0) 编辑