mysql 行列数据拷贝

采用个中间变量中转一下

SELECT DATA INTO @DATA FROM TABLE1 WHERE ID = 1

UPDATE TABLE1 SET DATA = @DATA

WHERE ID = 2

如果想一条语句搞掂，那么这样写

UPDATE TABLE1 A, TABLE1 B SET A.DATA = B.DATA

WHERE B.ID = 1

AND A.ID = 2

mysql里如何最快速度从一张表里取3列的值复制到另一张表里，有1亿条数据

一、复制表里面的一条记录并插入表里面

① insert into article(title,keywords,desc,contents) select title,keywords,desc,contents from article where article_id = 100

二、复制表里的多条数据/记录，并插入到表里面

① INSERT INTO `power_node`(title,type,status) SELECT title,type,status FROM power_node WHERE id <5

② INSERT into jiaban (num,overtime) SELECT num,overtime from jiaban where id IN(1,3,5,6,7,9)

三、在创建表时，就插入另一张表里面的某些数据

① create table user AS select * from member where id <10

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