This command adds a unique key, and drops all rows that generate errors (due to the unique key). This removes duplicates. ALTER IGNORE TABLE table ADD UNIQUE KEY idx1(title); Edit: Note that this command may not work for InnoDB tables for some versions of MySQL. See this post for a workaround. (Thanks to “an anonymous … Read more
Try this: SELECT MIN(id) AS id, title FROM tbl_countries GROUP BY title
Here is my take on it. select * from ( SELECT id, ROW_NUMBER() OVER(PARTITION BY merchant_Id, url ORDER BY id asc) AS Row FROM Photos ) dups where dups.Row > 1 Feel free to play with the order by to tailor the records you want to delete to your specification. SQL Fiddle => http://sqlfiddle.com/#!15/d6941/1/0 SQL … Read more
I got it! Simple and it worked great. delete t1 from tTable t1, tTable t2 where t1.locationName = t2.locationName and t1.id > t2.id http://www.cryer.co.uk/brian/sql/sql_delete_duplicates.htm
DELETE DupRows.* FROM MyTable AS DupRows INNER JOIN ( SELECT MIN(ID) AS minId, col1, col2 FROM MyTable GROUP BY col1, col2 HAVING COUNT(*) > 1 ) AS SaveRows ON SaveRows.col1 = DupRows.col1 AND SaveRows.col2 = DupRows.col2 AND SaveRows.minId <> DupRows.ID; Of course you have to extend col1, col2 in all three places to all columns. … Read more
I’m not sure why you want to ban JOIN as its fairly essential to SQL. It’s like banning function calls in a functional language. A good way to solve this is to create a result set containing the ids you want to return and join with it. Here’s one way to do it: SELECT Table1.* … Read more
This will remove duplicate items from your array using array_unique(): $new_arr = array_unique($arr, SORT_REGULAR);
The exact same question that people at the old AudioScrobbler and currently at MusicBrainz have worked on since long ago. For the time being, the Python project that can aid in your quest, is Picard, which will tag audio files (not only MPEG 1 Layer 3 files) with a GUID (actually, several of them), and … Read more