例子1 复制完全相同的记录(条件是表结构中没有auto_increment,和uniq字段）
mysql> select * from president;
+------------+---------------+--------+---------------------+-------+------------+------------+
| last_name | first_name | suffix | city | state | birth | death |
+------------+---------------+--------+---------------------+-------+------------+------------+
| Washington | George | NULL | Wakefield | VA | 1732-02-22 | 1799-12-14 |
| Adams | John | NULL | Braintree | MA | 1735-10-30 | 1826-07-04 |
| Jefferson | Thomas | NULL | Albemarle County | VA | 1743-04-13 | 1826-07-04 |
| Madison | James | NULL | Port Conway | VA | 1751-03-16 | 1836-06-28 |
mysql> desc president;
+------------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+-------------+------+-----+---------+-------+
| last_name | varchar(15) | NO | MUL | NULL | |
| first_name | varchar(15) | NO | | NULL | |
| suffix | varchar(5) | YES | | NULL | |
| city | varchar(20) | NO | | NULL | |
| state | varchar(2) | NO | | NULL | |
| birth | date | NO | | NULL | |
| death | date | YES | | NULL | |
+------------+-------------+------+-----+---------+-------+
在这种情况下要在表中复制一条Washington George 的记录，输入以下命令即可：
mysql> insert into president select * from president where last_name='Washington';
例子2：新增部分字段相同的记录
mysql> select * from manager;
+----+-------------+-------+-------------+----------+------------+---------------------+
| id | enable_flag | types | account | password | location | reg_date |
+----+-------------+-------+-------------+----------+------------+---------------------+
| 1 | 1 | 1 | abcd | 1234567 | | 0000-00-00 00:00:00 |
| 13 | 1 | 2 | anonymous | 654123 | 0100000000 | 2003-06-30 17:29:04 |
其表结构如下：
mysql> desc manager;
+-------------+-------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-------------+------+-----+---------------------+----------------+
| id | int(4) | NO | PRI | NULL | auto_increment |
| enable_flag | smallint(2) | NO | | 0 | |
| types | smallint(2) | NO | | 0 | |
| account | varchar(50) | NO | UNI | | |
| password | varchar(50) | NO | | | |
| location | varchar(10) | NO | | | |
| reg_date | datetime | NO | | 0000-00-00 00:00:00 | |
------------+-------------+------+-----+---------------------+----------------+
若想通过新增一条和manager 表中的anonymous这条记录，其它字段内容相同，但名字不同的记录(account为test)。则得用以下方法：
因为manager表的 id字段是auto_increment,而且account字段是具有唯一性的（UNI).所以我们得具体指定这两个字段的值。
mysql> insert into manager select '22',enable_flag,types,'test',password, location,reg_date from manager where account='anonymous';
