show variableslike'datadir'
查所有資料庫占用空間大小
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;
查指定資料庫占用空間大小
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 = 'im_db'
group by table_name
order by data_length desc;
mysql:檢視的資料庫表空間
/*1.檢視索引
（1）單位是gb*/
select
concat(round(
sum(index_length)/(1024*1024*1024), 6),
' gb'
) as
'total index size'
from
information_schema.tables
where
table_schema
like
'database'
;
/*
+------------------+
| total index
size
|
+------------------+
| 1.70 gb |
+------------------+
*/
/*
（2）單位是mb
*/
select
concat(round(
sum(index_length)/(1024*1024), 6),
' mb'
) as
'total index size'
from
information_schema.tables
where
table_schema
like
'database'
; /*
其中「database
」為你所要檢視的資料庫
*/
/*
2.檢視表空間
*/
select
concat(round(
sum(data_length)/(1024*1024*1024), 6),
' gb'
) as
'total data size'
from
information_schema.tables
where
table_schema
like
'database'
;
/*
+-----------------+
| total data size
|
+-----------------+
| 3.01 gb |
+-----------------+
*/
/*
3.檢視資料庫中所有表的資訊
*/
select
concat(table_schema,
'.',table_name)
as'table name'
,
table_rows as
'number of rows'
,
concat(round(data_length/(1024*1024*1024),6),' g'
) as
'data size'
,
concat(round(index_length/(1024*1024*1024),6),' g'
) as
'index size'
,
concat(round((data_length+index_length)/(1024*1024*1024),6),' g'
) as
'total'
from
information_schema.tables
where
table_schema
like
'database'
;
mysql查詢使用空間 查詢MYSQL庫表使用空間
1.檢視所有資料庫各容量大小 select table schema as 資料庫 sum table rows as 記錄數 sum truncate data length 1024 1024,2 as 資料容量 mb sum truncate index length 1024 1024,2 ...
查詢mysql庫空間 查詢MYSQL庫表使用空間
1.檢視所有資料庫各容量大小 select table schema as 資料庫 sum table rows as 記錄數 sum truncate data length 1024 1024,2 as 資料容量 mb sum truncate index length 1024 1024,2 ...
mysql 查詢表儲存空間占用
使用 schema 資料庫 mysql use information schema 字段 說明table schema 資料庫名 table name 表名engine 所使用的儲存引擎 tables rows 記錄數data length 資料大小 index length 索引大小 查詢資料庫...