摘要: SQL语法范式: SELECT xxx FROM xxx JOIN xxx WHERE xxx GROUP BY xxx HAVING xxx ORDER BY xx LIMIT xxx FOR xxx 几个概念:statement、clause、expression statement:语句,一条 阅读全文
posted @ 2016-09-29 17:02 March On 阅读(305) 评论(0) 推荐(0) 编辑
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