如何克隆/复制表及其数据，触发器和索引？
为了创建与旧表一样的新表及其数据，触发器和索引，我们需要运行以下两个查询
CREATE TABLE new_table LIKE old_table; INSERT new_table SELECT * from old_table;
示例
mysql> Create table employee(ID INT PRIMARY KEY NOT NULL AUTO_INCREMENT, NAME VARCHAR(20));
mysql> Describe employee;
+-------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+----------------+
| ID | int(11) | NO | PRI | NULL | auto_increment |
| NAME | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+----------------+
2 rows in set (0.07 sec)
mysql> Insert into employee(name) values('Gaurav'),('Raman');
Records: 2 Duplicates: 0 Warnings: 0
mysql> Select * from employee;
+----+--------+
| ID | NAME |
+----+--------+
| 1 | Gaurav |
| 2 | Raman |
+----+--------+
2 rows in set (0.00 sec)下面的查询将创建与表employee具有相似结构的表employee1。可以通过运行DESCRIBE查询来检查它。
mysql> create table employee1 like employee; mysql> describe employee1; +-------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+----------------+ | ID | int(11) | NO | PRI | NULL | auto_increment | | NAME | varchar(20) | YES | | NULL | | +-------+-------------+------+-----+---------+----------------+ 2 rows in set (0.14 sec)
现在，下面的查询将在employee1中插入与employee中相同的值，可以按以下方式检查
mysql> INSERT INTO employee1 select * from employee; Records: 2 Duplicates: 0 Warnings: 0 mysql> select * from employee1; +----+--------+ | ID | NAME | +----+--------+ | 1 | Gaurav | | 2 | Raman | +----+--------+ 2 rows in set (0.00 sec)
这样，我们也可以将表及其数据，触发器和索引一起克隆。