摘要: SELECT select_expr,… FROM table_reference [WHERE where_definition] [GROUP BY {col_name|expr|position}] [HAVING where_definition] [ORDER BY{col_name|ex 阅读全文
posted @ 2019-12-23 20:54 岁岁年年 阅读(472) 评论(0) 推荐(0) 编辑