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  1. stackoverflow.com › questions › 6296102MySQL Delete with Group By - Stack Overflow

    9 Ιουν 2011 · delete from YourTable where YourTable.columnA in (select columnA from YourTable group by column A having count(*) > 1)

  2. www.w3schools.com › mysql › mysql_deleteMySQL DELETE Statement - W3Schools

    DELETE Syntax. DELETE FROM table_name WHERE condition; Note: Be careful when deleting records in a table! Notice the. WHERE clause in the DELETE statement. The WHERE clause specifies which record (s) should be deleted. If you omit the WHERE clause, all records in the table will be deleted!

  3. ypereirareis.github.io › blog › 2018/03/02MySQL Delete with Group By and Having clauses. - Yannick...

    2 Μαρ 2018 · MySQL Delete with Group By and Having clauses. To achieve this exploit with a single simple MySQL command, we are using two useful functions: 1. GROUP_CONCAT () This function returns a string result with the concatenated non-NULL values from a group. It returns NULL if there are no non-NULL values. 2.

  4. dba.stackexchange.com › questions › 237729MySQL: Delete statement from complex select subquery

    9 Μαΐ 2019 · DELETE FROM users u1 WHERE username IN ( SELECT s1.username FROM ( SELECT count() ,u1.username ,u1.real_name ,group_concat(u1.STATUS) ,group_concat(u1.options) ,min(u1.end_date) ,max(u1.end_date) FROM users u1 INNER JOIN ( SELECT ui.username ,max(end_date) AS max_end_date FROM users ui GROUP BY ui.username ) u2 ON (u1.username = u2.username ...

  5. dba.stackexchange.com › questions › 289234mysql - Delete from GROUP BY with multiple GROUP columns -...

    4 Απρ 2021 · DELETE t1 FROM data t1 JOIN data t2 USING (channel_id,timestamp) WHERE t1.id > t2.id

  6. phoenixnap.com › kb › remove-delete-mysqlHow to Delete MySQL User Using DROP USER - phoenixNAP

    16 Απρ 2024 · Remove the user by executing the following DROP USER command: DROP USER '[username]'@'[host]'; Replace [username] and [host] with the relevant information about the user you want to delete.

  7. www.w3schools.com › mysql › mysql_groupbyMySQL GROUP BY Statement - W3Schools

    The GROUP BY statement is often used with aggregate functions (COUNT(), MAX(), MIN(), SUM(), AVG()) to group the result-set by one or more columns.

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