mysql 如何查看表的大小

mysql 查看表的大小方法：

1.查看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;

2.查看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;

3.查看指定数据库容量大小

例：查看mysql库容量大小：代码如下：

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=mysql;

4.查看指定数据库各表容量大小*

例：查看mysql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=mysql
order by data_length desc, index_length desc;