从一个 MySQL 表中取出所有记录并将其插入到另一个?
mysqlmysqli database更新于 2024/2/9 13:48:00
为此，您可以使用 CREATE TABLE AS SELECT 语句的概念。让我们首先创建一个表 −
mysql> create table DemoTable1518 -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(20) -> )AUTO_INCREMENT=101; Query OK, 0 rows affected (0.69 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1518(EmployeeName) values('John Doe');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable1518(EmployeeName) values('John Smith');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable1518(EmployeeName) values('David Miller');
Query OK, 1 row affected (0.14 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1518;
这将产生以下输出 −
+------------+--------------+ | EmployeeId | EmployeeName | +------------+--------------+ | 101 | John Doe | | 102 | John Smith | | 103 | David Miller | +------------+--------------+ 3 rows in set (0.00 sec)
以下查询用于从一个 MySQL 表中获取所有记录并将其插入到另一个表中 −
mysql> create table DemoTable1519 as select * from DemoTable1518; Query OK, 3 rows affected (0.62 sec) Records: 3 Duplicates: 0 Warnings: 0
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1519;
这将产生以下输出 −
+------------+--------------+ | EmployeeId | EmployeeName | +------------+--------------+ | 101 | John Doe | | 102 | John Smith | | 103 | David Miller | +------------+--------------+ 3 rows in set (0.00 sec)
