有时候我们需要知道Mysql的空间占用情况,包括索引的大小等,此时我们可以通过以下语句进行统计
统计数据库:
SELECT CONCAT( TRUNCATE(SUM(data_length) / 1024 / 1024, 2), 'MB' ) AS data_size, CONCAT( TRUNCATE(SUM(max_data_length) / 1024 / 1024, 2), 'MB' ) AS max_data_size, CONCAT( TRUNCATE(SUM(data_free) / 1024 / 1024, 2), 'MB' ) AS data_free, CONCAT( TRUNCATE(SUM(index_length) / 1024 / 1024, 2), 'MB' ) AS index_size FROM information_schema.tables WHERE TABLE_SCHEMA = '数据库名' ;
统计表:
SELECT CONCAT( TRUNCATE(SUM(data_length) / 1024 / 1024, 2), 'MB' ) AS data_size, CONCAT( TRUNCATE(SUM(max_data_length) / 1024 / 1024, 2), 'MB' ) AS max_data_size, CONCAT( TRUNCATE(SUM(data_free) / 1024 / 1024, 2), 'MB' ) AS data_free, CONCAT( TRUNCATE(SUM(index_length) / 1024 / 1024, 2), 'MB' ) AS index_size FROM information_schema.tables WHERE TABLE_NAME = '表名' ;
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