急救,,, 一个简单的sql语句怎么写。 select count(*) 个数 from 表 group by rno 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 select count(*) 个数 from 表 group by rno select rno,count(*) from table group by rno order by rno select rno from table order by rnoselect rno,count(*) from table group by rno create table t1(code int ,rno int, name varchar(40))select * from t1;insert into t1(code ,rno , name) values(1,1,'name')insert into t1(code ,rno , name) values(2,1,'name')insert into t1(code ,rno , name) values(3,2,'name')insert into t1(code ,rno , name) values(4,4,'name')insert into t1(code ,rno , name) values(5,3,'name')insert into t1(code ,rno , name) values(6,3,'name')insert into t1(code ,rno , name) values(7,3,'name')insert into t1(code ,rno , name) values(8,2,'name')select rno, count(rno) from t1 group by rno select rno,count(*) from table group by rno order by rno select rno, count(*)from tablegroup by rnohaving count(*) > 1 这个查找语句在查询分区器怎么写。 Sql查询问题,求解。。。 问个update的问题 如何获得 SQL Server 错误信息 急!急!急!急线在等一个小时,额帮忙吧。。。。。 知道一个表名tablename,获取该表的主键及其类型 怎样实现这样的录入方式??? 怎么把图片以二进制形式存入数据库中啊(sql server) analysis service-数据挖掘-挖掘数据的表现形式方面的问题 讨论,中文作标识符对系统的影响? 哪里有关于sqlserver2000的驱动下载呀,我指的是在jbuilder6.0中驱动呀? 求救!
select rno,count(*) from table group by rno
insert into t1(code ,rno , name) values(2,1,'name')
insert into t1(code ,rno , name) values(3,2,'name')
insert into t1(code ,rno , name) values(4,4,'name')
insert into t1(code ,rno , name) values(5,3,'name')
insert into t1(code ,rno , name) values(6,3,'name')
insert into t1(code ,rno , name) values(7,3,'name')
insert into t1(code ,rno , name) values(8,2,'name')select rno, count(rno) from t1 group by rno
from table
group by rno
having count(*) > 1