数据库——MySQL如何查看table(表)占用空间的大小

网上找的一个，亲测可用:

//先进去MySQL自带管理库：information_schema  
//然后查询 data_length,index_length
//你自己的数据库名：dbname   
//你自己的表名：tablename  
  
mysql> use information_schema;  
Database changed  
mysql> select data_length,index_length  
    -> from tables where  
    -> table_schema="dbname"  
    -> and table_name = "tablename";  
+-------------+--------------+  
| data_length | index_length |  
+-------------+--------------+  
|   166379520 |    235782144 |  
+-------------+--------------+  
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="dbname"  
    -> and table_name = "tablename";  
+----------------+-----------------+  
| data_length_MB | index_length_MB |  
+----------------+-----------------+  
| 158.67MB       | 224.86MB        |  
+----------------+-----------------+  
row in set (0.03 sec)