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最近在查看服务器导出的MySQL sql文件时发现如下代码： /*!50001 CREATE VIEW `cxda_cheat_view` AS SELECT1 AS `studentID`,1 AS `name`,1 AS `gender`,1 AS `subject`,1 AS `result`,1 AS `detail`,1 AS `grade`,1 AS `politicalStatu
mysql报错： 1449 -The user specified as a definer (xxx@%) does not exist 一般发生在mysql切换服务器导入导出之后，在使用存储过程、视图时产生错误！ 这是因为我们切换服务器后mysql的用户名设置错
最近有个需求，要在mysql的select查询结果中增加一个自增列，实现方法如下： 两句查完： set @rownum=0;select (@rownum:=@rownum+1),colname from [tablename or (subquery) a]; 一句查完： select @rownum:=@rownu
On Update和On Delete是SQL语言的一个标准，用于数据库外键定义，设置当主键表中的被参考列的数据发生变化时，外键表中响应字段的变换规则。 On Update表示主键表中被参考字段的值被更新
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MongoDB和MySQL都是流行的数据…
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