13 апр. 2010 г. · This removes duplicates in place, without making a new table. ALTER IGNORE TABLE `table_name` ADD UNIQUE (title, SID).

22 июл. 2010 г. · A really easy way to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword.

20 мая 2021 г. · How to remove duplicate rows and update relationships in mysql 8 · create a column in actors correct_id · find all duplicate rows in actors with ...

13 дек. 2021 г. · I have a table but it has no unique ID or primary key. It has 3 columns in total. I'd like to remove one entry with the name Ben. So output would look like ...

25 июл. 2019 г. · If you can have duplicate rows with the same data in all columns, then there is no way to delete a row without deleting its duplicates.

22 нояб. 2020 г. · The basic idea is to remove duplicate rows from the table and only keep the one with the smallest Id.

13 янв. 2011 г. · I would use SELECT DISTINCT name FROM names; if it were a SELECT query. How would I do this with DELETE to only remove duplicates and keep just one record of ...

24 мая 2011 г. · I have unique id and email fields. Emails get duplicated. I only want to keep one Email address of all the duplicates but with the latest id (the last inserted ...

2 окт. 2018 г. · The direct fix for your query is to use an "anti-join", where NOT joining is the important feature. This can be done with LEFT JOIN .

16 нояб. 2011 г. · It's possible to use a dirty flag with default value 1 and copy only single records with the flag set to 0 , then simply remove all dirty records.