MySQL查看数据库表容量大小

所有数据库容量大小

select
table_schema as '数据库',
sum(table_rows) as '记录数',
sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tables
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;

所有数据库各表容量大小

select
table_schema as '数据库',
table_name as '表名',
table_rows as '记录数',
truncate(data_length/1024/1024, 2) as '数据容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'
from information_schema.tables
order by data_length desc, index_length desc;

指定数据库容量大小

例：查看cake库容量大小

select
table_schema as '数据库',
sum(table_rows) as '记录数',
sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tables
where table_schema='cake';

指定数据库各表容量大小

例：查看cake库各表容量大小

select
table_schema as '数据库',
table_name as '表名',
table_rows as '记录数',
truncate(data_length/1024/1024, 2) as '数据容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'
from information_schema.tables
where table_schema='cake'
order by data_length desc, index_length desc;

下面是执行案例

MySQL [cake]> select
    -> table_schema as '数据库',
    -> sum(table_rows) as '记录数',
    -> sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
    -> sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
    -> from information_schema.tables
    -> where table_schema='cake';
+------------+-----------+------------------+------------------+
| 数据库     | 记录数    | 数据容量(MB)     | 索引容量(MB)     |
+------------+-----------+------------------+------------------+
| cake |  11288411 |         62084.71 |           493.86 |
+------------+-----------+------------------+------------------+
1 row in set (0.44 sec)

MySQL [cake]> select
    -> table_schema as '数据库',
    -> table_name as '表名',
    -> table_rows as '记录数',
    -> truncate(data_length/1024/1024, 2) as '数据容量(MB)',
    -> truncate(index_length/1024/1024, 2) as '索引容量(MB)'
    -> from information_schema.tables
    -> where table_schema='cake'
    -> order by data_length desc, index_length desc;
+------------+----------------------------------------+-----------+------------------+------------------+
| 数据库     | 表名                                   | 记录数    | 数据容量(MB)     | 索引容量(MB)     |
+------------+----------------------------------------+-----------+------------------+------------------+
| cake | abc-aaaaa-aaaaaaa                      |     24485 |         18287.54 |             7.90 |
| cake | users_history                          |    143010 |          9232.84 |             0.00 |
| cake | shop_product                           |    124804 |          8975.21 |            48.29 |
| cake | abc_abcdefgd                           |     61376 |          6618.92 |            33.71 |
| cake | cakefo_shop_product                    |     82390 |          4331.40 |             0.00 |
| cake | information                            |    104199 |          3398.68 |            32.21 |
| cake | stock_history                          |   9559497 |          3385.87 |             0.00 |