MySQL查看表占用空间大小

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 //查看的MySQL自带管理库:information_schema
 //例如要查的数据库是:test
 //例如要查的表是test数据库中的bikes

 mysql> use information_schema;
 Database changed
 mysql> select data_length,index_length
     -> from tables where
     -> table_schema='test'
     -> and table_name = 'bikes';
 +----------------+------------------+
 | data_length | index_length |
 +----------------+------------------+
 | 166379520 |   235782144 |
 +----------------+------------------+
 1 row in set (0.02 sec)

 mysql> select concat(round(sum(data_length/1024/1024),2),'MB') as data_length_MB,
     -> concat(round(sum(index_length/1024/1024),2),'MB') as index_length_MB
     -> from tables where
     -> table_schema='test'
     -> and table_name = 'bikes';
 +-----------------------+------------------------+
 | data_length_MB | index_length_MB |
 +-----------------------+------------------------+
 |      158.67MB      |      224.86MB        |
 +-----------------------+------------------------+
 1 row in set (0.03 sec)