这篇文章给大家介绍Mysql怎样查看数据库大小，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。

1 命令行进入数据库

[root@80~]#mysql-uroot-pEnterpassword:

2 查看数据库

mysql>showdatabases;+--------------------+|Database|+--------------------+|information_schema||mysql||test|+--------------------+

3 查看information_schema的"TABLES"

mysql>useinformation_schema;|TABLES|

4 查看字段结构

mysql>desctables;+-----------------+---------------------+------+-----+---------+-------+|Field|Type|Null|Key|Default|Extra|+-----------------+---------------------+------+-----+---------+-------+|TABLE_CATALOG|varchar(512)|NO|||||TABLE_SCHEMA|varchar(64)|NO|||||TABLE_NAME|varchar(64)|NO|||||TABLE_TYPE|varchar(64)|NO|||||ENGINE|varchar(64)|YES||NULL|||VERSION|bigint(21)unsigned|YES||NULL|||ROW_FORMAT|varchar(10)|YES||NULL|||TABLE_ROWS|bigint(21)unsigned|YES||NULL|||AVG_ROW_LENGTH|bigint(21)unsigned|YES||NULL|||DATA_LENGTH|bigint(21)unsigned|YES||NULL|||MAX_DATA_LENGTH|bigint(21)unsigned|YES||NULL|||INDEX_LENGTH|bigint(21)unsigned|YES||NULL|||DATA_FREE|bigint(21)unsigned|YES||NULL|||AUTO_INCREMENT|bigint(21)unsigned|YES||NULL|||CREATE_TIME|datetime|YES||NULL|||UPDATE_TIME|datetime|YES||NULL|||CHECK_TIME|datetime|YES||NULL|||TABLE_COLLATION|varchar(32)|YES||NULL|||CHECKSUM|bigint(21)unsigned|YES||NULL|||CREATE_OPTIONS|varchar(255)|YES||NULL|||TABLE_COMMENT|varchar(2048)|NO||||+-----------------+---------------------+------+-----+---------+-------+

5 查看DB的数据大小

mysql>selecttable_schema,round(sum(DATA_LENGTH)/1024/1024,2)astable_sizefromtablesgroupbytable_schema;+--------------------+------------+|table_schema|table_size|+--------------------+------------+|bomo_backend|0.09||test1|234.16||test2|0.17||information_schema|0.00||mysql|0.71||performance_schema|0.00||test|0.03|+--------------------+------------+

6 查看table的数据大小

mysql>selecttable_schema,table_name,concat(round(data_length/1024/1024,2),'M')astable_sizefromtableswheretable_schema='grab';+--------------+--------------+------------+|table_schema|table_name|table_size|+--------------+--------------+------------+|grab|product|215.12M||grab|result|13.52M||grab|rule|0.02M||grab|task|5.52M|+--------------+--------------+------------+

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