发布网友 发布时间:2022-04-07 17:57
共5个回答
懂视网 时间:2022-04-07 22:18
用的sqlserver2008 r2。
SELECT * FROM t_class WHERE id IN (SELECT id FROM (SELECT ROW_NUMBER() OVER (PARTITION BY id ORDER BY inserttime) AS rn, id FROM t_class) myclass WHERE rn >= 5) ORDER BY id;看起来好复杂,不知道有没有简单方法。
sqlserver查询某一字段重复超5次的所有记录
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热心网友 时间:2022-04-07 19:26
1.select c,count(*) from tbl group by c having count(*)>1;热心网友 时间:2022-04-07 20:44
最小缺少数,最大缺少数,不太明白啥是缺少数热心网友 时间:2022-04-07 22:19
select id,name ,count(*) from table group by id,name追问还有个第二题知道么 大神,第一题我根据上面那位说的已经解决了追答create table biao16 (a int,b varchar(12))
insert biao16 select 1,'a'
insert biao16 select 2,'a'
insert biao16 select 4,'a'
insert biao16 select 9,'a'
最小缺省值
select a=case when not exists(select * from biao16 where a=1 ) then 1
else(select min(a)+1 from biao16 t1 where not exists (select * from biao16 where a=t1.a+1))
end
最大缺省值
select a=case when not exists(select * from biao16 where a=9 ) then 9
else(select max(a)-1 from biao16 t1 where not exists (select * from biao16 where a=t1.a-1))
end
热心网友 时间:2022-04-08 00:10
了解一下group by追问大神能给下代码么追答可以到网上搜一下,这个是专门用来分组统计的。没有具体代码