如何合并两个MySQL表? [英] How can I merge two MySQL tables?

问题描述

如何合并结构相同的两个MySQL表?

How can I merge two MySQL tables that have the same structure?

两个表的主键将发生冲突，因此我已将其考虑在内.

The primary keys of the two tables will clash, so I have take that into account.

推荐答案

您也可以尝试:

INSERT IGNORE
  INTO table_1 
SELECT *
  FROM table_2
     ;

允许表_1中的行替换表_2中具有匹配主键的行，同时仍插入具有新主键的行.

which allows those rows in table_1 to supersede those in table_2 that have a matching primary key, while still inserting rows with new primary keys.

或者，

REPLACE
   INTO table_1
 SELECT *
   FROM table_2
      ;

将使用来自table_2的相应行更新table_1中已经存在的那些行，同时插入具有新主键的行.

will update those rows already in table_1 with the corresponding row from table_2, while inserting rows with new primary keys.

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