查看MySQL数据库大小
1.首先进入information_schema 数据库（存放了其他的数据库的信息）
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mysql> use information_schema;
Database
changed
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2.查看大小
（1）查看所有数据库大小
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mysql>
select
concat(round(
sum
(DATA_LENGTH/1024/1024),2),
'MB'
)
as
data
from
TABLES;
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结果：![这里写图片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIxOTcucG5n.png "\")
（2）查看指定数据库大小
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mysql>
select
concat(round(
sum
(DATA_LENGTH/1024/1024),2),
'MB'
)
as
data
from
TABLES
where
table_schema=
'CarData'
;
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结果![这里写图片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIxOTgucG5n.png "\")
（3）查看指定数据库的指定表单的大小
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1
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mysql>
select
concat(round(
sum
(DATA_LENGTH/1024/1024),2),
'MB'
)
as
data
from
TABLES
where
table_schema=
'CarData'
and
table_name=
'driver020294'
;
|
结果![这里写图片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIxOTkucG5n.png "\")
查看指定数据库指定表单的其他大小：
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mysql>
select
concat(round(
sum
(DATA_LENGTH/1024/1024),2),
'MB'
)
as
data_size,
-> concat(round(
sum
(MAX_DATA_LENGTH/1024/1024),2),
'MB'
)
as
max_data_size,
-> concat(round(
sum
(INDEX_LENGTH/1024/1024),2),
'MB'
)
as
index_size,
-> concat(round(
sum
(DATA_FREE/1024/1024),2),
'MB'
)
as
data_free
->
from
TABLES
where
table_schema=
'CarData'
and
table_name=
'driver020294'
;
|
结果：![这里写图片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIyMDAucG5n.png "\")
注：第一步也可以不用使用数据库，直接像下面这样写;
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5
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mysql>
select
concat(round(
sum
(DATA_LENGTH/1024/1024),2),
'MB'
)
as
data_size,
-> concat(round(
sum
(MAX_DATA_LENGTH/1024/1024),2),
'MB'
)
as
max_data_size,
-> concat(round(
sum
(INDEX_LENGTH/1024/1024),2),
'MB'
)
as
index_size,
-> concat(round(
sum
(DATA_FREE/1024/1024),2),
'MB'
)
as
data_free
->
from
INFORMATION_SCHEMA.TABLES
where
table_schema=
'CarData'
and
table_name=
'driver020294'
;
|
结果是一样的：