练涛
摘要: LIMIT语句限制查询数量[LIMIT {[offset,] row_count | row_count OFFSET offset}] demo: 限制查询结果为两条记录: SELECT * FROM user3 LIMIT 2; 限制查询结果为两条记录、并且从第三... 阅读全文
posted @ 2018-04-13 14:32 练涛 阅读(241) 评论(0) 推荐(0) 编辑
摘要: SELECT查询表达式解析SELECT select_expr [, select _expr …] [ FROM tb_references [WHERE where_condition] [GROUP BY {col_name | position} ... 阅读全文
posted @ 2018-04-13 13:53 练涛 阅读(161) 评论(0) 推荐(0) 编辑