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HomeDatabaseMysql Tutorialmysql从某表中查询数据插入到另一表的处理_MySQL

MySQL数据库为例,介绍如何通过SQL命令行将某个表的所有数据或指定字段的数据,导入到目标表 中。此方法对于SQLServer数据库,也就是T-SQL来说,同样适用 。

类别一、 如果两张张表(导出表和目标表)的字段一致,并且希望插入全部数据,可以用这种方法:

INSERT INTO  目标表  SELECT  * FROM  来源表 ;

例如,要将 articles 表插入到 newArticles 表中,则可以通过如下SQL语句实现:

INSERT INTO  newArticles  SELECT  * FROM  articles ;

类别二、 如果只希望导入指定字段,可以用这种方法:

INSERT INTO  目标表 (字段1, 字段2, ...)  SELECT   字段1, 字段2, ...   FROM  来源表 ;

请注意以上两表的字段必须一致,否则会出现数据转换错误


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