Error 1452 Mysql Foreign Key
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Mysql Error 1452 Foreign Key Constraint Fails
like you, helping each other. Join them; it only takes a minute: Sign up mysql foreign key error #1452 up vote 3 down vote favorite 1 ALTER TABLE `groups` ADD FOREIGN KEY ( `company_id` ) REFERENCES `summaries`.`companies`
Error 1452 Mysql Workbench
( `id` ) ON DELETE CASCADE ; MySQL said: #1452 - Cannot add or update a child row: a foreign key constraint fails (`summaries/#sql-164a_33c`, CONSTRAINT `#sql-164a_33c_ibfk_1` FOREIGN KEY (`company_id`) REFERENCES `companies` (`id`) ON DELETE CASCADE) companies.id is primary auto increment int(11) company_id is index int(11) I don't understand the error message. Can anyone shed some light on this? mysql share|improve this question asked Mar 4 '11 at 19:58 Webnet 23.3k65200345 Paste outputs of mysql error 1452 23000 both create table groups and summaries.companies ? –Zimbabao Mar 4 '11 at 20:00 add a comment| 4 Answers 4 active oldest votes up vote 22 down vote accepted That means you have at least one row in the child table that references a non-existent row in the parent table. If you are absolutely sure that you are okay with having a data integrity issue like that, you can add the foreign key by disabling foreign key checks before you run the ALTER TABLE command: SET FOREIGN_KEY_CHECKS = 0; share|improve this answer answered Mar 4 '11 at 20:10 Ike Walker 33.4k95278 add a comment| up vote 2 down vote I just had this problem, although in a somewhat more specific scenario. In my case, I had added, to an existing table, a column that I needed to be both nullable and act as a foreign key (i.e., for non-null entries to be bound by a foreign key constraint). The referenced column looked like this: +-------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+-------------+------+-----+---------+----------------+ | id | int(10) | NO | PRI | NULL | auto_increment | +-------------+-------------+------+-----+---------+----------------+ and the referencing one like this: +-------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+-------------+------+-----+---------+----------------+ | bed_id | int(10) | YES | | N
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Mysql Foreign Key Error 1215
of this site About Us Learn more about Stack Overflow the company Business error code 1452 mysql workbench Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges a foreign key constraint fails mysql insert Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: http://stackoverflow.com/questions/5198600/mysql-foreign-key-error-1452 Sign up ERROR 1452: Cannot add or update a child row: a foreign key constraint fails up vote 30 down vote favorite 6 I have created tables in MySQL Workbench as shown below : ORDRE table: Create table Ordre( OrdreID int NOT NULL, OrdreDato date DEFAULT NULL, KundeID int DEFAULT NULL, constraint Ordre_pk primary key(OrdreID), constraint Ordre_fk foreign key(KundeID) references Kunde(KundeID) ) engine http://stackoverflow.com/questions/21659691/error-1452-cannot-add-or-update-a-child-row-a-foreign-key-constraint-fails = InnoDB; PRODUKT table: Create table Produkt( ProduktID int NOT NULL, ProduktBeskrivelse varchar(100) DEFAULT NULL, ProduktFarge varchar(20) DEFAULT NULL, Enhetpris int DEFAULT NULL, constraint Produkt_pk primary key(ProduktID) ) engine = InnoDB; and ORDRELINJE table: Create table Ordrelinje( Ordre int NOT NULL, Produkt int NOT NULL, AntallBestilt int DEFAULT NULL, constraint Ordrelinje_pk primary key(Ordre, Produkt), constraint Ordrelinje_fk foreign key(Ordre) references Ordre(OrdreID), constraint Ordrelinje_fk1 foreign key(Produkt) references Produkt(ProduktID) ) engine = InnoDB; so when I try to insert values into ORDRELINJE table i get : Error Code: 1452. Cannot add or update a child row: a foreign key constraint fails (srdjank.Ordrelinje, CONSTRAINT Ordrelinje_fk FOREIGN KEY (Ordre) REFERENCES Ordre (OrdreID)) I've seen the other posts on this topic, but no luck. Am I overseeing something or ... Any idea what to do? mysql mysql-error-1452 share|improve this question edited Feb 9 '14 at 14:34 Mihai 15.3k52442 asked Feb 9 '14 at 13:37 user3289677 151123 1 possible duplicate of Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails –Sagar Naliyapara Jul 16 '15 at 5:07 add a comment| 3 Answers 3 act
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies http://stackoverflow.com/questions/14222967/mysql-foreign-key-constraint-error-1452-cannot-add-or-update-child-row of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a foreign key minute: Sign up MySQL Foreign key constraint - Error 1452 - Cannot add or update child row up vote 3 down vote favorite I've used the other posts on this topic, but I'm having no luck. Here's the code I execute: UPDATE tblOrderItems SET `ItemID` = 0004 WHERE `OrderNum`= 203 AND `OrderItemID` = 26 Here's my error: Error Code: 1452. Cannot add error 1452 mysql or update a child row: a foreign key constraint fails (`cai0066`.`tblOrderItems`, CONSTRAINT `ItemID` FOREIGN KEY (`ItemID`) REFERENCES `tblCatalogItems` (`ItemID`)) Notes: It happens when I either INSERT or UPDATE into tblOrderItems. tblCatalogItems does have an ItemID of 0004. See: this Here are the create statements generated by MySQL Workbench: delimiter $$ CREATE TABLE `tblCatalogItems` ( `ItemID` varchar(10) NOT NULL DEFAULT '', `ItemName` varchar(50) DEFAULT NULL, `Wholesale` decimal(10,2) DEFAULT NULL, `Cost5-10` decimal(10,2) DEFAULT NULL, `Cost11-19` decimal(10,2) DEFAULT NULL, `Cost20` decimal(10,2) DEFAULT NULL, `Retail` decimal(10,2) DEFAULT NULL, PRIMARY KEY (`ItemID`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1$$ delimiter $$ CREATE TABLE `tblItemCosts` ( `Cost` decimal(10,2) DEFAULT NULL, `VendorID` int(11) NOT NULL, `ItemID` varchar(10) NOT NULL, KEY `VendorID_idx` (`VendorID`), KEY `ItemID_idx` (`ItemID`), CONSTRAINT `VendorID` FOREIGN KEY (`VendorID`) REFERENCES `tblVendors` (`VendorID`) ON DELETE NO ACTION ON UPDATE NO ACTION ) ENGINE=InnoDB DEFAULT CHARSET=latin1$$ delimiter $$ CREATE TABLE `tblOrderItems` ( `OrderItemID` int(11) NOT NULL AUTO_INCREMENT, `OrderNum` int(11) NOT NULL, `PayPalTxnID` int(10) DEFAULT NULL, `Description` varchar(225) DEFAULT NULL, `Quantity` int(11) DEFAULT NULL, `UnitPrice` decimal(10,2) DEFAULT NULL, `ItemStatus` varchar(30) DEFAULT NULL, `TrackingNumber` varchar(50) DEFAULT NULL, `ShippingCost` decimal(10,2) DEFAULT NULL, `ItemID` varchar(50) DEFAULT NULL, `TotalPrice` decimal