mysql查看某库表大小

查询所有数据库占用磁盘空间大小的SQL语句：

语句如下

select TABLE_SCHEMA, concat(truncate(sum(data_length)/1024/1024,2),' MB') as data_size,
concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size
from information_schema.tables
group by TABLE_SCHEMA
order by data_length desc;

　　

执行结果如下

mysql> select TABLE_SCHEMA, concat(truncate(sum(data_length)/1024/1024,2),' MB') as data_size,
concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size
from information_schema.tables
group by TABLE_SCHEMA
order by data_length desc;
+--------------------+------------+------------+
| TABLE_SCHEMA       | data_size  | index_size |
+--------------------+------------+------------+
| shdx               | 1042.38 MB | 258.97MB   |
| mysql              | 0.52 MB    | 0.08MB     |
| information_schema | 0.00 MB    | 0.00MB     |
+--------------------+------------+------------+
3 rows in set

mysql>

　　

查询单个库中所有表磁盘占用大小的SQL语句：

执行语句如下

select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB') as data_size,
concat(truncate(index_length/1024/1024,2),' MB') as index_size
from information_schema.tables where TABLE_SCHEMA = 'TestDB'
group by TABLE_NAME
order by data_length desc;

以上语句测试有效，注意替换以上的TestDB为数据库名　

执行结果如下，截取部分

mysql> select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB') as data_size,
concat(truncate(index_length/1024/1024,2),' MB') as index_size
from information_schema.tables where TABLE_SCHEMA = 'shdx'
group by TABLE_NAME
order by data_length desc;
+--------------------------------+-----------+------------+
| TABLE_NAME                     | data_size | index_size |
+--------------------------------+-----------+------------+
| tab_automatch_log              | 499.08 MB | 95.03 MB   |
| tab_fundlog201505              | 101.96 MB | 19.13 MB   |
| tab_online                     | 63.49 MB  | 14.32 MB   |
| tab_game_record201505          | 56.97 MB  | 30.93 MB   |
| tab_user                       | 52.17 MB  | 12.31 MB   |
| dc_user_action_active          | 39.94 MB  | 0.00 MB    |
| tab_gametime_day               | 37.22 MB  | 21.50 MB   |
| tab_fundlog                    | 35.12 MB  | 6.45 MB    |
| tab_game_record                | 19.85 MB  | 10.56 MB   |
| tab_feeaccount                 | 19.17 MB  | 10.75 MB   |
| tab_userinfo                   | 18.78 MB  | 6.33 MB    |
| tab_userfund                   | 17.91 MB  | 9.51 MB    |
| tab_click_count                | 14.63 MB  | 1.75 MB    |
| tab_achievement_log            | 10.51 MB  | 1.36 MB    |
| tab_gameloginlog201505         | 5.78 MB   | 0.75 MB    |
| tab_gametime                   | 4.29 MB   | 3.16 MB    |
| tab_gameloginlog               | 3.83 MB   | 0.50 MB    |
| tab_login_log201505            | 2.79 MB   | 0.67 MB    |
| tab_system_operatelog          | 2.74 MB   | 0.19 MB    |
| tab_singleplay_score           | 2.10 MB   | 0.28 MB    |
| tab_game_record201301          | 1.93 MB   | 1.08 MB    |
| tab_game_score_shddz           | 1.61 MB   | 0.80 MB    |
| tab_game_score_ddz             | 1.39 MB   | 0.66 MB    |
| tab_game_score_shmj            | 1.34 MB   | 0.67 MB    |
| tab_game_xyzdx_getscore_detail | 1.28 MB   | 0.21 MB    |

　　

参考链接

http://www.jb51.net/article/40789.htm