Home Database Mysql Tutorial MySQL修改数据表存储引擎的3种方法介绍_MySQL

MySQL修改数据表存储引擎的3种方法介绍_MySQL

Jun 01, 2016 pm 01:06 PM

MySQL作为最常用的数据库,经常遇到各种各样的问题。今天要说的就是表存储引擎的修改。有三种方式,列表如下。

1.真接修改。在数据多的时候比较慢,而且在修改时会影响读取性能。my_table是操作的表,innoDB是新的存储引擎。
复制代码 代码如下:ALTER TABLE my_table ENGINE=InnoDB

2.导出,导入。这个比较容易操作,直接把导出来的sql文件给改了,然后再导回去。用mysqldump ,枫哥常用的是navicate那样更容易上手。友情提醒风险较大。

3.创建,插入。这个比第一种速度快, 安全性比第二种高,推荐。分2步操作

a.创建表,先创建一个和要操作表一样的表,然后更改存储引擎为目标引擎。   
复制代码 代码如下:
CREATE TABLE my_tmp_table LIKE my_table;
ALTER TABLE my_tmp_table ENGINE=InnoDB;
b.插入。为了安全和速度,最好加上事务,并限制id(主键)范围。
复制代码 代码如下:
INSERT INTO my_tmp_table SELECT * FROM my_table;
就到这里,希望对需要的同学有帮助。

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