15 янв. 2013 г. · The best way to delete duplicate rows by multiple columns is the simplest one: Add an UNIQUE index: ALTER IGNORE TABLE your_table ADD UNIQUE (field1,field2, ... Delete duplicate records based on two columns in MySql Remove duplicate rows based on specific columns Remove duplicated based on two columns - Stack Overflow Remove duplicates based on two columns and reversed values Другие результаты с сайта stackoverflow.com

8 окт. 2021 г. · Basically create a subquery that gets you only one of the duplicates... if you don't have an id column it's more difficult, but still doable ...

18 апр. 2023 г. · To remove duplicates from two columns in an SQL database, you can use the DISTINCT keyword along with a UNION statement. Here's an example query ... How to delete duplicate rows in MySQL without using ... - Quora How do you find duplicate records based on two columns (SQL ... Другие результаты с сайта www.quora.com

22 февр. 2021 г. · The easiest way to remove duplicates is to join the table with itself: DELETE z.* FROM kraken AS w JOIN kraken AS z ON z.exchange_pair ...

28 нояб. 2021 г. · In SQL, some rows contain duplicate entries in multiple columns(>1). For deleting such rows, we need to use the DELETE keyword along with self-joining the ...

31 мая 2014 г. · I'd suggest that you make a compound PK out of the two columns and not have an 'id' field. But as you're already on this path,

28 мар. 2024 г. · One of the most common methods of deleting duplicate records from MySQL tables is using DELETE JOIN – the INNER JOIN clause in the DELETE statement.

20 мая 2022 г. · To remove these rows that have duplicates across two columns, we need to highlight the cell range A1:B16 and then click the Data tab along the top ribbon and ...

20 июн. 2024 г. · Delete duplicate rows by creating an intermediate table using the GROUP BY clause. To do this, transfer only the unique rows to the newly ...

1 июл. 2016 г. · Plan A: ALTER IGNORE TABLE users ADD UNIQUE(email, alt_email, mobile and alt_mobile); This will go through the table, copy it over, ignoring any dups.