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我有一个表有两个colums,id和日期。这里是相同的样本数据。删除oracle中的重复记录
ID DATE
1 01-Jan -14 05.42.23.000000000 pm
1 01-Jan -14 05.06.17.000000000 pm
2 01-Jan -14 05.26.16.000000000 pm
2 01-Jan -14 05.41.20.000000000 pm
3 01-Jan -14 05.21.19.000000000 pm
3 01-Jan -14 05.08.18.000000000 pm
4 01-Jan -14 05.14.17.000000000 pm
4 01-Jan -14 05.17.17.000000000 pm
列ID
有哪些需要删除,我想保持这行列DATE
较大的重复数据。
我编写SQL,但结果不正确。
delete from newproducts a
where a.id in
(select t.id from newproducts t group by t.id having count(*) > 1)
and a.date not in
(select max(t.date) from newproducts t group by t.id having count(*) > 1);
如何更正?谢谢
Noooooooo!不是另外删除重复的问题!我们如何删除重复的“删除重复”问题? – tbone