1.查找重复数据表的id以及重复数据的条数
select max(id) as nid,count(id) as 重复条数 from tableName
group by linkname Having Count(*) > 1
2.查找重复数据表的主键
select id from UsedCar_Articles
where id not in (
select min(id) as nid from UsedCar_Articles
group by ArticleTitle Having Count(id) > 1
)
3.删除重复的数据
delete from UsedCar_Articles
where id not in (
select min(id) as nid from UsedCar_Articles
group by ArticleTitle Having Count(id) > 1
)
4.插入重复的数据
INSERT Articles (ClassID, ArticleTitle,ArticleInfo,
ArticleClicks,IsHot,IsTop,IssueTime,
SiteProvinceID,SiteCityID)
SELECT ClassID, ArticleTitle,ArticleInfo,
ArticleClicks,IsHot,IsTop,IssueTime,
SiteProvinceID,SiteCityID
FROM Articles