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sql查询字段重复数据

查询重复数据,方法如下:select * from [表A] where id in (select id from [表A] group by id having count(id) >1 )

1 select* from表名 where数据相5261同的4102字1653段回答 in(select数据相同的字段 from(select*,ROW_NUMBER() over (partition by数据相同的字段 orderby数据相同的字段) num from表名 ) a wherea.num>1)

select count(name) c,name from student where c>1 不知道sql对不对 思路应该没问题 应该会报 不是分组 的错误吧调一调 select count(name) c,max(name) from student group by name having c>1 ??自己调一调吧,应该差不多

select idnumber,count(idnumber) from table group by idnumber having count(idnumber)>1 查出来的idnumber 就是重复数据了

示例如下:select 字段 from 数据库名称 where id=指定的值

select sum(case when cc=0 then 1 else 0) 0次数,sum(case when cc=1 then 1 else 0) 1次数,sum(case when cc=2 then 1 else 0) 2次数 from tt

查询一个表中某两个字段的相同数据代码是:Select Name,ID From A group by Name,ID having count (*)>1.结构化查询语言(Structured Query Language)简称SQL,结构化查询语言是一种数据库查询和程序设计语言,用于存取数据以及查询

select field_set.field,caes when tb_a.field is not NULL then 'V' else '' end as [in tb_a],caes when tb_b.field is not NULL then 'V' else '' end as [in tb_a]from (select distinct field from tb_aunionse

、查找表中多余的重复记录(多个字段) select * from vitae awhere (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)4、删除表中多余的重复记录(多个字段),只留有rowid最小的记录delete from

我根据要求写了以下的SQL,不知道符不符合要求,建表SQLcreate table ta(id number,name varchar2(10))insert into ta (ID,NAME)values (1,'a');insert into ta (ID,NAME)

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