SQLSERVER中统计所有表的记录数 利用系统索引表sysindexes中索引ID indid<1的行中的rows列存有该表的行数这一特点. 方法是利用隐藏未公开的系统存储过程sp_MSforeachtable ), RowCnt INT) EXEC sp_MSforeachtable 'INSERT INTO #temp SELECT ''?'', COUNT(*) FROM ?' SELECT TableName, RowCnt FROM #temp ORDER BY RowCnt…
SqlAzure中的方式: select t.name ,s.row_count from sys.tables t join sys.dm_db_partition_stats s ON t.object_id = s.object_id and t.type_desc = 'USER_TABLE' and t.name not like '%dss%' order by row_count desc SQLServer的方式: select a.name as '表名',b.rows as…
select a.name as 表名,max(b.rows) as 记录条数 from sysobjects a ,sysindexes b where a.id=b.id and a.xtype='u' group by a.name order by max(b.rows) desc select SUM(记录条数) as 总记录数 from( select top 10000 a.name as 表名,max(b.row…
今天需要筛选出来库中行数不为零的表,于是动手写下了如下存储过程. CREATE PROCEDURE TableCount AS BEGIN SET NOCOUNT ON ),RowsCount INT) DECLARE @indexid AS INT DECLARE @maxid AS INT DECLARE @count AS INT ) ) FROM dbo.sysobjects WHERE type='U' FROM @t1 WHILE(@maxid>=@indexid) BEGIN SE…
1.Oracle查询数据库中所有表的记录数,但是有可能不准建议用第二种方式进行查询 select t.table_name,t.num_rows from user_tables t 2.创建oracle函数,通过函数中查询词表记录数显示当前记录数 create or replace function count_rows(table_name in varchar2, owner in varchar2 default null) return number authid current_us…
SqlServer中怎么删除重复的记录(表中没有id) 其实我在别的网址也查到过删除重复的记录,不知道我是我SqlServer2012版本太低还是啥原因 delete from scwhere (c#,s#) in (select c#,s# from sc group by c#,s# having count(1)>1)and rowid not in (select min(rowid) from sc group by c#,s# having count(1)>1) 像这个就执行不通…
如何在Linux中统计一个进程的线程数 原文:http://os.51cto.com/art/201509/491728.htm 我正在运行一个程序,它在运行时会派生出多个线程.我想知道程序在运行时会有多少线程.在Linux中检查进程的线程数最简单的方法是什么?如果你想看到Linux中每个进程的线程数,有以下两种方法实现. 问题:我正在运行一个程序,它在运行时会派生出多个线程.我想知道程序在运行时会有多少线程.在 Linux 中检查进程的线程数最简单的方法是什么? 如果你想看到 Linux 中每…
--第1种 执行全表扫描才能获得行数 SELECT count(*) FROM BUS_tb_UserGradePrice --第2种 执行扫描全表id不为空的,获得行数 select count(userid) from BUS_tb_UserGradePrice where userid is not NULL --第3种 直接从系统表中查询表的总记录数(特别适合大数据) SELECT rows FROM sysindexes WHERE id = OBJECT_ID('dbo.BUS_tb…
环境:mssql ent 2k8 r2 原理:遍历所有用户表,用sp_spaceused过程分别获取每张表的行数并写入临时表,最后返回临时表 IF OBJECT_ID('tempdb..#TableRowCount','U') IS NOT NULL DROP TABLE #TableRowCount GO ,), Reserved ), Data ), Index_Size ), Unused )) GO DECLARE curCntAllTableRows CURSOR LOCAL FAST…
select schema_name(t.schema_id) as [ Schema ], t. name as TableName,i. rows as [RowCount] from sys.tables as t, sysindexes as i where t.object_id = i.id and i.indid <=1…
use information_schema; SELECT DISTINCT t.table_name, t.engine '表引擎', t.table_rowsFROM TABLES tWHERE 1 = 1AND t.table_schema = 'mysql_database_name'-- 自己数据库的名字 AND t. ENGINE IS NOT NULLORDER BY t.table_name,t.table_rows ; SELECTt.TABLE_SCHEMA '数据库',t…
今天公司两个远端的数据库主从同步有点问题,查看下wordpress库下所有表的表的条目? mysql> use information_schema;Database changedmysql> select table_name,table_rows from tables where TABLE_SCHEMA = 'wordpress'order by table_rows desc;+-----------------------+------------+| table_name |…
SELECT object_name (i.id) TableName, rows as RowCnt FROM sysindexes i INNER JOIN sysObjects o ON (o.id = i.id AND o.xType = 'U ') WHERE indid < 2 ORDER BY RowCnt desc,TableName…
select a.name as 表名,max(b.rows) as 记录条数 from sysobjects a ,sysindexes b where a.id=b.id and a.xtype='u' group by a.name order by max(b.rows) desc 当如果使用子查询对上面语句做求和方法时会报下面错误: 除非另外还指定了 TOP 或 FOR XML,否则,ORDER BY 子句在视图.内联函数.派生表.子查询和公用表表达式中无效. 只要我们在嵌套子查询视图…
1.一般情况下删除表数据的sql语句: delete from products 2.如果想给表起个别名再删除呢,就得像下面这样写了 delete products from products as p 也可这样 delete p from products as p 3.想一下,什么情况下删除一个表数据的时候要用别名呢? 之所以要用别名,是因为delete的where条件中需要用到子查询写一些条件,举例: 利用自连接删除表中重复的数据: CREATE TABLE [dbo].[products…
性能测试的时候对SQLserver DB中的CPU,io,内存进行监控 可以通过系统进程表查看资源使用情况 注意要有master权限 select top 10 * from SYSPROCESSES order by cpu descselect top 10 * from SYSPROCESSES order by physical_io descselect top 10 * from SYSPROCESSES order by memusage desc Status:进程ID 状态do…
