Mysql 1452 Error
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Cannot Add Or Update A Child Row A Foreign Key Constraint Fails On Delete Cascade On Update Cascade)
Join them; it only takes a minute: Sign up Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails up vote 179 down vote favorite 53 I'm having a bit of a strange problem, I'm trying to add a foreign key to one table that references another, but it is failing for some
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reason. With my limited knowledge of MySQL, the only thing that could possibly be suspect is that there is a foreign key on a different table referencing the one I am trying to reference. Here is a picture of my table relationships, generated via phpMyAdmin: Relationships I've done a SHOW CREATE TABLE query on both tables, sourcecodes_tags is the table with the foreign key, sourcecodes is the referenced table. CREATE TABLE `sourcecodes` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `user_id` int(11) unsigned NOT NULL, `language_id` int(11) unsigned NOT NULL, `category_id` int(11) unsigned NOT NULL, `title` varchar(40) CHARACTER SET utf8 NOT NULL, `description` text CHARACTER SET utf8 NOT NULL, `views` int(11) unsigned NOT NULL, `downloads` int(11) unsigned NOT NULL, `time_posted` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`), KEY `user_id` (`user_id`), KEY `language_id` (`language_id`), KEY `category_id` (`category_id`), CONSTRAINT `sourcecodes_ibfk_3` FOREIGN KEY (`language_id`) REFERENCES `languages` (`id`) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT `sourcecodes_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT `sourcecodes_ibfk_2` FOREIGN KEY (`category_id`) REFERENCES `c
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Er_no_referenced_row_2
Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. mysql foreign key constraint fails Join them; it only takes a minute: Sign up MySQL Error Code 1452 Foreign Key Constraint up vote 2 down vote favorite I'm receiving an error when I attempt to create two tables. There was a multivalued dependency, so http://stackoverflow.com/questions/1253459/mysql-error-1452-cannot-add-or-update-a-child-row-a-foreign-key-constraint-fa I separated the tables and came up with this: CREATE TABLE NAME ( NameID Integer NOT NULL AUTO_INCREMENT, Name varChar(255) NOT NULL, CONSTRAINT NAME_PK PRIMARY KEY(NameID) ); CREATE TABLE PHONE ( NameID Integer NOT NULL, PhoneNumber varChar(15) NOT NULL, NumType varChar(5) NOT NULL, CONSTRAINT PHONE_FK FOREIGN KEY(NameID) REFERENCES NAME(NameID), CONSTRAINT PHONE_PK PRIMARY KEY(NameID) ); But when attempting to add values with this code: INSERT INTO NAME (NameID, Name) VALUES (default, 'John Doe'); INSERT INTO PHONE (NameID, PhoneNumber, NumType) http://stackoverflow.com/questions/22210461/mysql-error-code-1452-foreign-key-constraint VALUES (default, '706-782-4719', 'Home'); I receive the infamous 1452 error: Error Code: 1452. Cannot add or update a child row: a foreign key constraint fails (`phone_mcneill`.`PHONE`, CONSTRAINT `PHONE_FK` FOREIGN KEY (`NameID`) REFERENCES `NAME` (`NameID`)) I am not entirely sure what this means as I have NameID autoincrementing in the first table. I can't have it auto_increment in the second one as well as it's a foreign key, correct? Thanks in advance for the help. mysql sql database foreign-keys mysql-error-1452 share|improve this question asked Mar 5 '14 at 22:10 Archibald 272215 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted You have defined a foreign key constraint on NameID column i.e in table PHONE using insert for phone table you have passed default against NameID ,but NameID is pointing to NAME table and expecting to have the inserted record id from NAME table it doesn't have a default value as per the docs When a new AUTO_INCREMENT value has been generated, you can also obtain it by executing a SELECT LAST_INSERT_ID() So your second insert can use the inserted if from NAME table like INSERT INTO NAME (NameID, NAME) VALUES (DEFAULT, 'John Doe'); INSERT INTO PHONE (NameID, PhoneNumber, NumType) VALUES (LAST_INSERT_ID(), '706-782-4719', 'Home'); And you can grab results from both tables by joining them select * from NAME JOIN PHONE USING (NameID) How to Get the Uniqu
here for a quick overview of the site Help Center Detailed answers to any questions you http://stackoverflow.com/questions/20028196/error-1452-mysql might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers http://forums.mysql.com/read.php?10,626303 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 foreign key of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error 1452 MySQL up vote 2 down vote favorite Inserting data into an empty table, but got error 1452. I am not sure why MySQL mentions the NameInfo table within the error. CREATE TABLE NameInfo foreign key constraint ( Language VARCHAR(7) NOT NULL, Status VARCHAR(13) NOT NULL, Standard VARCHAR(13) NOT NULL, Name VARCHAR(13) NOT NULL, Name_ID INT(4) NOT NULL, Place_ID INT(9) NOT NULL, Supplier_ID INT(4) NOT NULL, Date_Supplied DATE NOT NULL, PRIMARY KEY (Name_ID), FOREIGN KEY (Supplier_ID) REFERENCES Supplier(Supplier_ID), FOREIGN KEY (Place_ID) REFERENCES Place(Place_ID) ); CREATE TABLE Departments ( Dept_ID INT(6) NOT NULL, Dept_NAME VARCHAR(25) NOT NULL, DeptHead_ID INT(6) NOT NULL, DeptAA VARCHAR(20) NOT NULL, ParentDept_ID INT(4) NOT NULL, Location VARCHAR(10) NOT NULL, DeptType VARCHAR(12) NOT NULL, Primary key (Dept_ID) ); CREATE TABLE Employee ( Emp_ID INT(6) NOT NULL, Name VARCHAR(15) NOT NULL, Dept_ID INT(6) NOT NULL, Tax_ID INT(4) NOT NULL, Country VARCAR(15) NOT NULL, Hire_Date DATE NOT NULL, Birth_Date DATE NOT NULL, Salary INT(6) NOT NULL, Bonus INT(6) NOT NULL, AddressInfo VARCHAR(30) NOT NULL, PRIMARY KEY(Emp_ID), FOREIGN KEY(Dept_ID) REFERENCES Departments(Dept_ID) ); Inserted data to parent table, Departments, before child table, Employee. INSERT INTO Departments VALUES (040124,'Human Resource Division',405802,'Mohammed Siddiqui',1001,'California','HR'); INSERT INTO Employee VALUES (901126,'Kenneth Tran',040126,3013,'United States',06/01/2013,06/01/1992,80430,500,'
Community Podcasts MySQL.com Downloads Documentation Section Menu: MySQL Forums :: Newbie :: Error Code: 1452. Cannot add or update a child row New Topic Advanced Search Error Code: 1452. Cannot add or update a child row Posted by: K Sqlnicus () Date: January 01, 2015 02:25PM I get error 1452: Cannot add or update a child row: a foreign key constraint fails (`ap`.`invoices`, CONSTRAINT `invoices_fk_vendors` FOREIGN KEY (`vendor_id`) REFERENCES `vendors` (`vendor_id`) ON DELETE NO ACTION ON UPDATE NO ACTION) 0.000 sec Query I tried to execute: INSERT INTO invoices (vendor_id, invoice_number, invoice_date, invoice_total, terms_id, invoice_due_date) VALUES (12, '3289175', '2011-07-18', 165, 3, '2011-08-17'); UPDATE invoices SET credit_total = 35.89 WHERE invoice_number = '367447'; UPDATE invoices SET invoice_due_date = DATE_ADD(invoice_due_date, INTERVAL 30 DAY) WHERE terms_id = 4; DELETE FROM invoices WHERE invoice_number = '4-342-8069'; DELETE FROM invoices WHERE invoice_total - payment_total - credit_total = 0; Using XAMPP 1.8.3 Certificate: Cisco CCNA Navigate:Previous Message•Next Message Options:Reply•Quote Subject Written By Posted Error Code: 1452. Cannot add or update a child row K Sqlnicus 01/01/2015 02:25PM Re: Error Code: 1452. Cannot add or update a child row Peter Brawley 01/01/2015 05:52PM Re: Error Code: 1452. Cannot add or update a child row K Sqlnicus 01/03/2015 11:54AM Sorry, you can't reply to this topic. It has been closed. powered by phorum Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party. Contact Sales USA: +1-866-221-0634 Canada: +1-866-221-0634 Germany: +49 89 143 01280 France: +33 1 57 60 83 57 Italy: +39 02 249 59 120 UK: +44 207 553 8447 Japan: 0120-065556 China: 10800-811-0823 India: 0008001005870 More Countries» Contact Us Online» Products MySQL Enterprise Edition MySQL Standard Edition MySQL Classic Edition MySQL Cluster CGE MySQL Embedded (OEM/ISV) Services Training Certification Consulting Support Downloads MySQL Community Server MySQL Cluster MySQL Fabric MySQL Utilities MySQL Workbench About MySQL Contact Us How to Buy Partners Job Opportunities Site Map Documentation MySQL Reference Manuals MySQL Workbench Expert Guides Topic Guides MySQL Cluster Legal Legal Policies Your Privacy Rights Terms of Use Trademark Policy Contributor Agreement © 2015, Oracle Corporation a