MySQL將表a中查詢的資料插入到表b中,mysql

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MySQL將表a中查詢的資料插入到表b中,mysql

MySQL將表a中查詢的資料插入到表b中

如果表b存在

insert into b select * from a;

如果表b不存在

create table b as select * from a;

擴充:

將b表中的某寫欄位值插入到a表中

insert into a (userID,userName) select b.userID,b.userName from tr_ajax_chat_messages;

將a表和b表userID相等的值儲存到a表

update a set a.userName=(select b.userName from b where a.userID = b.userID);



將一個表的查詢結果插入到另一個表中(oracle、mysql、sql 、GP)

如果表存在:
insert into tab1 select * from tab2;
如果表不存在:
create table tab1 as select * from tab2;
 
mysql怎將a資料庫表1移動到b資料庫

如果是php 就用phpmyadmin 把表一 匯出成.sql檔案,再到匯入到b資料庫裡

如果是jsp, 可以用一款軟體 mysql-front,可視化的mysql資料庫作業系統。通過這個你可以把表一匯出,在匯入到b資料庫
 

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