查看MySQL數據庫大小
1.首先進入information_schema 數據庫（存放了其他的數據庫的信息）
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2
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mysql> use information_schema;
Database
changed
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2.查看大小
（1）查看所有數據庫大小
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mysql>
select
concat(round(
sum
(DATA_LENGTH/1024/1024),2),
'MB'
)
as
data
from
TABLES;
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結果：![這里寫圖片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIxOTcucG5n.png "\")
（2）查看指定數據庫大小
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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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結果![這里寫圖片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIxOTgucG5n.png "\")
（3）查看指定數據庫的指定表單的大小
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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'
;
|
結果![這里寫圖片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIxOTkucG5n.png "\")
查看指定數據庫指定表單的其他大小：
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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'
;
|
結果：![這里寫圖片描述](/image/aHR0cHM6Ly93d3cuMmN0by5jb20vdXBsb2FkZmlsZS9Db2xsZmlsZXMvMjAxNzA0MDgvMjAxNzA0MDgwOTE4MjIyMDAucG5n.png "\")
注：第一步也可以不用使用數據庫，直接像下面這樣寫;
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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'
;
|
結果是一樣的：