Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal StudiesMySQL 中用不同列从一张表中复制记录到另一张表中的查询
你可以使用 INSERT INTO SELECT 语句。我们先创建一个表——
mysql> create table DemoTable1900 ( ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, ClientName varchar(20), ClientAge int default 29 ) auto_increment=1000; Query OK, 0 rows affected (0.00 sec)
使用插入命令在表中插入一些记录——
mysql> insert into DemoTable1900(ClientName,ClientAge) values('Chris',45);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1900(ClientName,ClientAge) values('David',29);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1900(ClientName,ClientAge) values('Mike',37);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1900(ClientName) values('Sam');
Query OK, 1 row affected (0.00 sec)使用选择语句显示表中的所有记录——
mysql> select * from DemoTable1900;
这将生成以下输出——
+----------+------------+-----------+ | ClientId | ClientName | ClientAge | +----------+------------+-----------+ | 1000 | Chris | 45 | | 1001 | David | 29 | | 1002 | Mike | 37 | | 1003 | Sam | 29 | +----------+------------+-----------+ 4 rows in set (0.00 sec)
以下是创建第二个表的查询——
mysql> create table DemoTable1901 ( EmployeeId int, EmployeeName varchar(20), EmployeeAge int ); Query OK, 0 rows affected (0.00 sec)
以下是用不同列从一张表中复制记录到另一张表中的查询——
mysql> insert into DemoTable1901(EmployeeId,EmployeeName,EmployeeAge) select ClientId,ClientName, ClientAge from DemoTable1900; Query OK, 4 rows affected (0.00 sec) Records: 4 Duplicates: 0 Warnings: 0
使用选择语句显示表中的所有记录——
mysql> select * from DemoTable1901;
这将生成以下输出——
+------------+--------------+-------------+ | EmployeeId | EmployeeName | EmployeeAge | +------------+--------------+-------------+ | 1000 | Chris | 45 | | 1001 | David | 29 | | 1002 | Mike | 37 | | 1003 | Sam | 29 | +------------+--------------+-------------+ 4 rows in set (0.00 sec)
更新于: 27-Dec-2019
552 次浏览
广告