将一张表中的数据插入另外一张表
1、两张表结构相同
insert into 表1名称 select * from 表2名称
2、两张结构不相同的表
insert into 表1名称(列名1,列名2,列名3···) select 列1,列2,列3 ··· from 表2名称
3、从另一张表获取某几个字段插入另一张表
insert into 表1名称(列名1,列名2,列名3···)values(数据1,数据2,(select 列名3 from 表2名称 ))
三张结构相同的表查询一条记录
SELECT t.* FROM ( SELECT * FROM Service_.UserAccount_1 UNION SELECT * FROM Service_.UserAccount_2 UNION SELECT * FROM Service_.UserAccount_3 ) t WHERE t.userId IN (1146190515, 1167527419, 3554447);
SELECT t.* FROM ( SELECT * FROM Service_.UserAccount_1 WHERE userId IN (11641901, 11647279, 34547) UNION SELECT * FROM Service.UserAccount_2 WHERE userId IN (11690415, 11642719, 34447) UNION SELECT * FROM Service.UserAccount_3 WHERE userId IN (1519015, 10637719, 35447) ) t;