將一張表中的數據插入另外一張表
1、兩張表結構相同
insert into 表1名稱 select * from 表2名稱
2、兩張結構不相同的表
insert into 表1名稱(列名1,列名2,列名3···) select 列1,列2,列3 ··· from 表2名稱
3、從另一張表獲取某幾個字段插入另一張表
insert into 表1名稱(列名1,列名2,列名3···)values(數據1,數據2,(select 列名3 from 表2名稱 ))
三張結構相同的表查詢一條記錄
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;