查看所有库的大小 mysql> use information_schema; Database changed mysql> selectconcat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from TABLES; +----------+ | data | +----------+ | 104.21MB | +----------+ 1 row in set (0.11 sec) 查看指定库的大小 mysql> s
1.进去指定schema 数据库(存放了其他的数据库的信息) mysql> use information_schema; 2.查询所有数据的大小 mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from TABLES; 3.查看指定数据库实例的大小,比如说数据库 yoon mysql> select concat(round(sum(DATA_LENGTH/1024
本文转自:http://blog.sina.com.cn/s/blog_4c197d420101fbl9.html 查看所有库的大小 mysql> use information_schema; Database changed mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from TABLES; +----------+ | data | +----------+ | 104.21MB
if exists(select 1 from tempdb..sysobjects where id=object_id('tempdb..#tabName') and xtype='u')drop table #tabNamegocreate table #tabName(tabname varchar(100),rowsNum varchar(100),reserved varchar(100),data varchar(100),index_size varchar(100),unus
要求计算某个表所占表空间的大小,网上查了些资料用到了oracle的3个视图.具体sql如下 select segment_name as tablename, round(bytes / (select sum(a.bytes) from dba_data_files a, user_users b ,) from user_segments where segment_name = '表名' 该sql只保留了小数点后3位
SELECT CONCAT(ROUND((INDEX_LENGTH+DATA_LENGTH)/1024/1024, 2), 'MB') AS '总大小',CONCAT(ROUND(DATA_LENGTH/1024/1024, 2), 'MB') AS '数据大小',CONCAT(ROUND(INDEX_LENGTH/1024/1024, 2), 'MB') AS '索引大小' FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='youwoapp
原文:sqlserver查询所有表的行数的sql语句 select object_name(id),rowcnt from sysindexes where indid<2 and objectproperty(id,'ismsshipped')=0 order by rowcnt desc select a.name, b.rows from sysobjects a inner join sysindexes b on a.id = b.id where a.type = 'u' and b
sqlServer 数据库纵横表相互转化 一.纵表转横表: 1.纵表: 2.横表: 3. 代码: select Name as '姓名', end) as '语文', end) as '数学', end) as '英语' from Score group by Name 二.横表转纵表: 1.横表: 2.竖表: 3.代码: select * from( select Name as '姓名','语文' as '语文',Chinise as '分数' from Score1 union all
