查看mysql数据库大小

1、进入information_schema 数据库(存放了其他的数据库的信息)

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use information_schema;       #一定要先进这个库,才能查询信息

2、查询所有数据的大小:

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select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables;

3、查看指定数据库的大小:
比如查看数据库test的大小

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select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='test';

4、查看指定数据库的某个表的大小
比如查看数据库test中 members 表的大小

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select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='test' and table_name='members';

例子:

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mysql> use information_schema;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables;
+-----------+
| data |
+-----------+
| 658247MB |
+-----------+
1 row in set, 1 warning (2.93 sec)
# mysql
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