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SQL重复数据的筛选 sql 筛选不重复数据

2021-04-09知识9

SQL筛选不重复数据的案例 delet from 表名where PRP_Numbernot int(select PRP_Number,count(*)from 表名where gourp by PRP_Numberhaving count(*)>;1)andPRP_Number not in(select PRP_Number from 表名 whereconvaert(int,PRP_Number)convert(int,substring(select PRP_Number from 表名 where PRP_Number like这里写你不要删除重复的P0002-P0003之间的第一个P0002,如下'?P0002')0,charindex('_'))andconvaert(int,PRP_Number)>;convert(int,substring(select PRP_Number from 表名 where PRP_Number like这里写你不要删除重复的P0002-P0003之间的最后的P0003,如下'?P0003')0,charindex('_'))P0001-P0002我就不写了,你按照上面的思路你自己套用吧慎用,请看清再执行

求sql语句筛选重复数据并统计 表及数据create table a(机构编码 int,参保号 varchar(6),就诊时间 datetime)insert into a values(2001,'321284','2012-06-01 08:43:28.193')insert into a values(2001,'321284','2012-06-01 14:46:56.320')insert into a values(2001,'321285','2012-06-03 08:48:37.323')insert into a values(2002,'321286','2012-06-02 08:45:24.163')insert into a values(2002,'321286','2012-06-02 08:03:50.550')insert into a values(2003,'321287','2012-06-07 08:39:55.233')执行select t.机构编码,count(distinct 参保号)from(select 机构编码,参保号,convert(varchar(10),就诊时间,120)就诊时间,count(*)c from agroup by 机构编码,参保号,convert(varchar(10),就诊时间,120))tgroup by t.机构编码结果

SQL语句怎么筛选表中某一字段不重复的数据行数? 可以参考使用如下写法如果要全部数据则可以select*from table T1 where 字段=(select max(字段)from table T2 where T1.字段2=T2.字段2)或select*from table T1 where not exists(select*from table T2 where T1.字段2=T2.字段2 and T1.字段字段如果只是数据行数则可以select count(distinct 字段)from table

#excel sql自动筛选#sql excel 筛选计数#sql 筛选#sql 筛选不重复数据

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