SQL statement for mysql to delete duplicate data and mysql to delete data

Source: Internet
Author: User

SQL statement for mysql to delete duplicate data and mysql to delete data

Create table tmp as select id FROM get_review_url WHERE (no, title, name, content) IN (SELECT no, title, name, content FROM get_review_url group by no, title, name, content having count (*)> 1) AND id not in (select min (id) FROM get_review_url group by no, title, name, content having count (*)> 1 ); delete from get_review_url WHERE id IN (SELECT id FROM tmp); drop table tmp;


Evaluate an SQL statement for deleting duplicate data from a mysql database: delete from article_chapter where aid not in (select max (aid) from article_chapter group by articleid, chaptername)
How do I write SQL statements that delete duplicate Row Records and retain a row in oracle Database? Delete from tab where rowid in (
Select rowid from (select rank () OVER (partition by repeated field order by rowid) t
FROM tab WHERE repeated field IN (select name1 from tab group by repeated field having count (repeated field)> 1) WHERE t> 1 );

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.