SQL 去重

delete from testtable a where (a.testcontent) in (select testcontent from testtable GROUP BY testcontent having count(*)>1) and seqid not in (select min(seqid) from testtable group by testcontent having count(*)>1)

SQL 去重,布布扣,bubuko.com

原文：http://smilezhuolin.blog.51cto.com/7671611/1405987