SELECT dbid,count() FROM [Master].[dbo].[SYSPROCESSES] WHERE spid> and status='sleeping' group by dbid order by count() desc and waittype = 0x0000 and waittime = and status = 'sleeping' and last_batch < dateadd(minute, -, getdate()) and login_time &
查看连接状态.问题电脑等信息: select sid,serial#,username,program,machine,status from v$session; 2.查看sql; select sql_text, count(*) from v$sql s, v$session se where se.prev_hash_value=s.hash_value and se.status='INACTIVE' group by sql_text; 1.利用Oracle数据库的动态性能视图v$
未提交事务 长期未提交事务,指开启事务后,长时间未向MySQL发出SQL执行请求或事务处理(COMMIT/ROLLBACK)请求,在系统表`information_schema`.`INNODB_TRX` 中状态为RUNNING,而在`information_schema`.`PROCESSLIST`中状态为SlEEP. ## 查看未提交的事务(3秒内未操作的事务) SELECT p.ID AS conn_id, P.USER AS login_user, P.HOST AS login_hos
内连接查询 内连接与SqL中inner join一样,即找出两个序列的交集 Model1Container model = new Model1Container(); //内连接 var query = from s in model.Student join c in model.Course on s.CourseCno equals c.Cno select new { ClassID = s.CourseCno, ClassName = c.Cname, Student = new {
查询分页的几种Sql写法 摘自:http://www.cnblogs.com/zcttxs/archive/2012/04/01/2429151.html 1.创建测试环境,(插入100万条数据大概耗时5分钟). create database DBTest use DBTest --创建测试表 create table pagetest ( id int identity(1,1) not null, col01 int null, col02 nvarchar(50) null, col03