概述

今天主要介绍MySQL查看数据库表容量大小的几个方法，仅供参考。

1、查看所有数据库容量大小

SELECT
	table_schema AS '数据库',
	sum( table_rows ) AS '记录数',
	sum( TRUNCATE ( data_length / 1024 / 1024, 2 ) ) AS '数据容量(MB)',
	sum( TRUNCATE ( index_length / 1024 / 1024, 2 ) ) AS '索引容量(MB)' 
FROM
	information_schema.TABLES 
GROUP BY
	table_schema 
ORDER BY
	sum( data_length ) DESC,
	sum( index_length ) DESC;

2、查看所有数据库各表容量大小

SELECT
	table_schema AS '数据库',
	table_name AS '表名',
	table_rows AS '记录数',
	TRUNCATE ( data_length / 1024 / 1024, 2 ) AS '数据容量(MB)',
	TRUNCATE ( index_length / 1024 / 1024, 2 ) AS '索引容量(MB)' 
FROM
	information_schema.TABLES 
ORDER BY
	data_length DESC,
	index_length DESC;

3、查看指定数据库容量大小

SELECT
	table_schema AS '数据库',
	sum( table_rows ) AS '记录数',
	sum( TRUNCATE ( data_length / 1024 / 1024, 2 ) ) AS '数据容量(MB)',
	sum( TRUNCATE ( index_length / 1024 / 1024, 2 ) ) AS '索引容量(MB)' 
FROM
	information_schema.TABLES 
WHERE
	table_schema = 'mysql';

4、查看指定数据库各表容量大小

SELECT
	table_schema AS '数据库',
	table_name AS '表名',
	table_rows AS '记录数',
	TRUNCATE ( data_length / 1024 / 1024, 2 ) AS '数据容量(MB)',
	TRUNCATE ( index_length / 1024 / 1024, 2 ) AS '索引容量(MB)' 
FROM
	information_schema.TABLES 
WHERE
	table_schema = 'mysql' 
ORDER BY
	data_length DESC,
	index_length DESC;

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