mysql表引擎修改

1、修改建表引擎

mysql> CREATE TABLE test_2(
    -> name varchar(10),
    -> year int(10))
    -> ENGINE=InnoDB;            -->创建表时指定默认引擎
Query OK, 0 rows affected (0.10 sec)

mysql> show create table test_2\G
*************************** 1. row ***************************
       Table: test_2
Create Table: CREATE TABLE `test_2` (
  `name` varchar(10) DEFAULT NULL,
  `year` int(10) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
1 row in set (0.00 sec)

mysql>


mysql> show tables;
+------------------+
| Tables_in_excise |
+------------------+
| test1            |
| test_1           |
+------------------+
2 rows in set (0.00 sec)

mysql> show create table test_1\G
*************************** 1. row ***************************
       Table: test_1
Create Table: CREATE TABLE `test_1` (
  `name` varchar(20) DEFAULT NULL,
  `year` int(5) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1     --> 默认的表引擎为MyISAM;
1 row in set (0.00 sec)

mysql> alter table test_1 type=InnoDB;  -->  修改表的数据引擎;
Query OK, 0 rows affected, 1 warning (0.11 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> show create table test_1\G
*************************** 1. row ***************************
       Table: test_1
Create Table: CREATE TABLE `test_1` (
  `name` varchar(20) DEFAULT NULL,
  `year` int(5) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1  --> 显示表的数据引擎已经变为InnoDB;
1 row in set (0.00 sec)

mysql>

2、

mysql> show engines;   -->  查看MySQL支持引擎   
+------------+---------+------------------------------------------------------------+--------------+------+------------+
| Engine     | Support | Comment                                                    | Transactions | XA   | Savepoints |
+------------+---------+------------------------------------------------------------+--------------+------+------------+
| MRG_MYISAM | YES     | Collection of identical MyISAM tables                      | NO           | NO   | NO         |
| CSV        | YES     | CSV storage engine                                         | NO           | NO   | NO         |
| MyISAM     | DEFAULT | Default engine as of MySQL 3.23 with great performance     | NO           | NO   | NO         |
| InnoDB     | YES     | Supports transactions, row-level locking, and foreign keys | YES          | YES  | YES        |
| MEMORY     | YES     | Hash based, stored in memory, useful for temporary tables  | NO           | NO   | NO         |
+------------+---------+------------------------------------------------------------+--------------+------+------------+
5 rows in set (0.00 sec)

mysql>