Mysql Error 1217
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about rails mysql2::error: cannot delete or update a parent row: a foreign key constraint fails hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask mysql delete foreign key constraint Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. cannot update a parent row: a foreign key constraint fails Join them; it only takes a minute: Sign up Can't drop table: A foreign key constraint fails up vote 22 down vote favorite 9 In MySQL I want to drop a table. I tried a lot things but I
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keep getting the error that the table named bericht can't be dropped. This is the error I'm getting: #1217 - Cannot delete or update a parent row: a foreign key constraint fails How do I drop this table? mysql sql drop-table share|improve this question edited Mar 21 '13 at 10:06 CloudyMarble 23.8k1566110 asked Jun 19 '12 at 12:26 roy 116114 2 Find out what other table is referencing it via foreign key, and first drop the FK constraint mysql force drop table on that table, then drop this table. –Michael Berkowski Jun 19 '12 at 12:27 You need to remove the requirement by other tables on the one you dont want any more –BugFinder Jun 19 '12 at 12:27 1 Do any of these answers help you? stackoverflow.com/questions/1905470/… stackoverflow.com/questions/3334619/… –Douglas Ludlow Jun 19 '12 at 12:35 add a comment| 3 Answers 3 active oldest votes up vote 36 down vote This should do the trick: SET FOREIGN_KEY_CHECKS=0; DROP TABLE bericht; SET FOREIGN_KEY_CHECKS=1; As others point out, this is almost never what you want, even though it's whats asked in the question. A more safe solution is to delete the tables depending on bericht before deleting bericht. See CloudyMarble answer on how to do that. I use bash and the method in my post to drop all tables in a database when I don't want to or can't delete and recreate the database itself. The #1217 error happens when other tables has foreign key constraints to the table you are trying to delete and you are using the InnoDB database engine. This solution temporarily disables checking the restraints and then re-enables them. Read the documentation for more. Be sure to delete foreign key restraints and fields in tables depending on bericht, otherwise you might leave your database in a broken state. share|improve this answer edited Jul 22 at 18:21 answered Apr 25
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Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error code 1217 http://stackoverflow.com/questions/11100911/cant-drop-table-a-foreign-key-constraint-fails in MySQL code [duplicate] up vote 0 down vote favorite This question already has an answer here: Bogus foreign key constraint fail 9 answers I'm getting the error: Error 1217 in my MySQL code. My MySQL code is DROP TABLE IF EXISTS Formed; DROP TABLE IF EXISTS Album; DROP TABLE IF EXISTS Band; DROP TABLE IF EXISTS Customers; DROP TABLE IF EXISTS Track; CREATE TABLE http://stackoverflow.com/questions/36629400/error-code-1217-in-mysql-code Formed( FormedID int AUTO_INCREMENT, YearFormed int, CountryFormed varchar(50), CityFormed varchar(50), BandMembers varchar(400), PRIMARY KEY(FormedID)) ENGINE=InnoDB; CREATE TABLE Track ( TrackID int AUTO_INCREMENT, AlbumID int AUTO_INCREMENT, Songs varchar (100), TrackNumber varchar (20), Title varchar (30), TrackDuration varchar (4), PRIMARY KEY (TrackID)) ENGINE=InnoDB; CREATE TABLE Album( AlbumID int AUTO_INCREMENT, TrackID int AUTO_INCREMENT, BandID int AUTO_INCREMENT, KEY(TrackID), KEY(BandID), Price varchar(5), PublicationDate varchar(11), Title varchar(30), Genre varchar (36), PRIMARY KEY(AlbumID)) ENGINE=InnoDB; CREATE TABLE Band( BandID int AUTO_INCREMENT, AlbumID int AUTO_INCREMENT, KEY(AlbumID), RecordLabel varchar(50), PRIMARY KEY(BandID)) ENGINE=InnoDB; CREATE TABLE Customers ( CustomerID int AUTO_INCREMENT, CName varchar (20), CPhone int (11), CEmail varchar (50), CPPaid varchar (50), CPDate date, PRIMARY KEY (CustomerID)) ENGINE=InnoDB; ALTER TABLE Track ADD FOREIGN KEY (AlbumID) REFERENCES Album(AlbumID)ON DELETE SET NULL ON UPDATE CASCADE; ALTER TABLE Album ADD FOREIGN KEY (TrackID) REFERENCES Track(TrackID)ON DELETE SET NULL ON UPDATE CASCADE; ALTER TABLE Album ADD FOREIGN KEY (BandID) REFERENCES Band(BandID)ON DELETE SET NULL ON UPDATE CASCADE; ALTER TABLE Band ADD FOREIGN KEY (AlbumID) REFERENCES Album(AlbumID)ON DELETE SET NULL ON UPDATE CASCADE; And I'm getting the error DROP TABLE IF EXISTS Album Error Code: 1217. Cannot delete or update a parent row: a foreign key constraint fails, it
1217. Cannot delete or update a parent row: a foreign https://www.euperia.com/development/fix-for-mysql-error-code-1217-a-foreign-key-constraint-fails/1303 key constraint fails' you need to toggle the foreign_key_checks variable first. The reason for this error is because your tables have foreign keys which rely on the table http://www.bigmarv.net/blog/2012/03/30/mysql-cannot-delete-or-update-a-parent-row-a-foreign-key-constraint-fails/ you're attempting to change. Here's the fix for MySQL error Code 1217 - A foreign key constraint fails: SET foreign_key_checks = 0; DROP TABLE `stats`; SET foreign_key_checks foreign key = 1; I hope this helps someone else. « Inspecting jQuery event handlersJob Control Commands: fg, bg and ctrl-z » AM Andrew McCombe Magento Certified Website Developer Staffordshire, UK Follow @euperia Twitter Google+ Github Latest Posts Magento Snippet: Use a Group By clause on a collection model Managing Homebrew Services I'm a Magento Certified foreign key constraint Developer! Fix for PHP Composer "????%" issue Introducing Hit The Ground: Laravel Edition Magento Custom Variables MySQL Foreign Key Tutorial Testing Magento Email with Mailtrap.io How to backup and restore with Magento 2 Product and Breadcrumb Rich Snippets in Magento Magento Snippet: How to set and get cookies in Magento Solved: PHP Imagick ‘unable to open image' PDF Magento Snippet: Admin grid currency type with currency symbol My Current Podcasts TIL: MySQL FLUSH PRIVILEGES isn't needed MySQL fix: Field ‘xxxx' doesn't have a default value 20 years of PHP #20yearsofphp Useful Oh-My-Zsh plugins Install Beanstalkd on Ubuntu 12.04 How to pear install HTTP2 and HTTP_Request2 Categories Development Linux Magento Miscellaneous Music Review Website Performance About Ads: Whilst we all hate adverts, this site needs to be funded somehow. Therefore you will only ever see one advert per page on this site. If you're using an ad-blocker, please consider unblocking this site. Thanks. Twitter Google+ Github Copyright © Andrew McCombe 1972 - 2016
recreate the schema on my little project's database: ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails When I encountered this before, I ended up dropping the entire database, recreating it, and then restoring the schema. But that seems a bit, well, rude. Turns out you can temporarily disable foreign key checks: SET FOREIGN_KEY_CHECKS=0; Just be sure to restore them once you're done messing around: SET FOREIGN_KEY_CHECKS=1; Did you like this article? Share it with your friends! Tweet Leave a Reply Cancel reply You must be logged in to post a comment. Anything in here will be replaced on browsers that support the canvas element oracle databaseproxy tools programming networkingproxytoolsMacbookProAnti-PatternswordpressthemebloggingHumorScreen ScrapingTime Other Stuff I Wrote Activate TiVo's 30 second skip easter egg Adding Google AdSense to your HTML pages Meta Log in Entries RSS Comments RSS WordPress.org © 2016 bigmarv.net Powered by Pinboard Theme and WordPress