Question

我有一张名为 TEST

的表格

------------------------------------------  
ID  name          intime            
------------------------------------------      
1   ABC           2015-09-03 10:00:00       
1   ABC           2015-09-03 10:00:00       
2   XYZ           2015-09-03 11:00:00       
2   XYZ           2015-09-03 11:00:00

我的目标是从表中删除重复记录，就像ABC intime重复一样。我只有一个例子，我有多个记录而不仅仅是4个记录。

我正在尝试这样的事情

with cte as 
(
select id,InTime ,count(*) as c
from intime as m
where InTime between convert(varchar(10),'2015-09-01 00:01:00',103) and convert(varchar(10),'2015-09-30 00:01:00',103)
group by id,InTime
having count(*) > 1
)
select * from cte
order by ID

输出

id  InTime                 c    
----------------------------------  
1   2015-09-03 10:00:00    2    
2   2015-09-03 11:00:00    2

此查询将为我提供在同一日期具有多个intime的记录

with cte as 
(
select ID, inTime,
row_number() over (partition by convert(varchar(10),intime,103) order by intime desc) as r
from intime
where ID in (1)
and
inTime between '2015-09-01 00:01:00' and '2015-09-30 23:59:59'
)
select * from cte

delete  from cte
where r > 1

这是将删除重复条目的查询。

我面临的问题是我必须逐个手动输入ID，如果我在（1,2）

中执行ID

它输出为：

ID  inTime              r   
2   2015-09-03 11:00:00 1   
2   2015-09-03 11:00:00 2   
1   2015-09-03 10:00:00 3   
1   2015-09-03 10:00:00 4

然后，如果我删除r＆gt; 1，它将删除3行。

我想创建一些可以删除表中所有重复记录的内容。我正在使用sql-2008。任何建议都会有所帮助。

Answer 1

试试这个

with abc as
  (
  select * ,rn=ROW_NUMBER()over(partition by ID ,name,intime order by columnName)from yourtablename
  )

  delete from abc where rn>1

Answer 2

为什么不将数据复制到带有DISTINCT的新表中？

- 复制...... 从yourtablename

中选择DISTINCT *到tmp_yourtablename

- 删除原始数据 truncate table yourtablename

- 重装他们...... 从tmp_yourtablename

插入yourtablename select *

- 完成所有操作后删除tmp_yourtablename ...

需要从表中删除多个记录

2 个答案: