create table new_table
select * from old_talbe;

这种方法会将old_table中所有的内容都拷贝过来,用这种方法需要注意,new_table中没有了old_table中的primary key,Extra,auto_increment等属性,需要自己手动加,具体参看后面的修改表即字段属性.
只复制表结构到新表

# 第一种方法,和上面类似,只是数据记录为空,即给一个false条件
create table new_table
select * from old_table where 1=2;

# 第二种方法
create table new_table like old_table;

2.新表存在
复制旧表数据到新表(假设两个表结构一样)

insert into new_table
select * from old_table;

复制旧表数据到新表(假设两个表结构不一样)

insert into new_table(field1,field2,.....)
select field1,field2,field3 from old_table;

复制全部数据

select * into new_table from old_table;

只复制表结构到新表

select * into new_talble from old_table where 1=2;

3.实例

（1）表不存在复制

mysql>show tables; 
+-----------------+ 
|Tables_in_test1 | 
+-----------------+ 
|cpu_stat | 
|test1 | 
|test2 | 
|test3 | 
+-----------------+ 
4rows in set (0.02 sec) 
 
mysql> create tabletest4 as select * from test1 where 1=0; 
//仅复制表结构 
QueryOK, 0 rows affected (0.06 sec) 
Records:0 Duplicates: 0 Warnings: 0 
 
mysql> create tabletest5 as select * from test1; 
//把表test1所有内容复制为test5 
QueryOK, 7 rows affected (0.11 sec) 
Records:7 Duplicates: 0 Warnings: 0 

（2）表已经存在复制

mysql> create table test6(id int not null auto_increment primary key, name varchar(20)); 
Query OK, 0 rows affected (0.13 sec) 
 
mysql> insert into test6(name) select name from test1; 
//只复制name列 
Query OK, 7 rows affected (0.06 sec) 
Records: 7 Duplicates: 0 Warnings: 0 
 
mysql> select * from test6; 
+----+-------+ 
| id | name | 
+----+-------+ 
| 1 | wu | 
| 2 | terry | 
| 3 | tang | 
…… 
7 rows in set (0.00 sec)