MySQL數據和索引占用空間查詢

查詢所有數據庫占用磁盤空間大小的SQL語句

SELECT
	table_schema, -- 數據庫名稱
	concat( TRUNCATE ( sum( data_length ) / 1024 / 1024, 2 ), 'MB' ) AS data_size, -- 數據占用空間
	concat( TRUNCATE ( sum( index_length ) / 1024 / 1024, 2 ), 'MB' ) AS index_size -- 索引占用空間
FROM
	information_schema.TABLES 
GROUP BY
	table_schema 
ORDER BY
	sum( data_length ) DESC;

查詢單個庫中所有表磁盤占用大小的SQL語句

SELECT
	table_name, -- 表名稱
	concat( TRUNCATE ( data_length / 1024 / 1024, 2 ), 'MB' ) AS data_size, -- 數據占用空間
	concat( TRUNCATE ( index_length / 1024 / 1024, 2 ), 'MB' ) AS index_size -- 索引占用空間
FROM
	information_schema.TABLES 
WHERE
	table_schema = '數據庫名稱' 
ORDER BY
	data_length DESC;

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