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 PR...

This seems to be a common error, but for the life of me I can't figure this out. I have a set of InnoDB user tables in MySQL that are tied together via foreign key; the parent user table, and a se...

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 reason. With my limited knowledge of MySQL, the only thing th...

I've been trying to add a foreign key to my table using heidisql and I keep getting the error 1452. After reading around I made sure all my tables were running on InnoDB as well as checking that t...

I tried to insert data into the table Bookratings, but I keep getting this error message. Is this because when I try to insert, it creates duplicates in the Bookratings table, which is not allowed ...

I have created two tables in MySQL 5.6.11 as shown below by means of MySQL Workbench 5.2.47. The country table: delimiter $$ CREATE TABLE `country` ( `id` int(11) NOT NULL AUTO_INCREMENT, `cou...

i am trying to import a sql dump of magento along with some product data and i get this foreign key constraint error: `ERROR 1452 (23000) at line 231680: Cannot add or update a child row: a foreig...

I have a simple query UPDATE `t_timecard_detail` SET `timeoff_request_id` = 'adad8e0d-c22b-41c3-a460-6cf982729299' WHERE `id` = 'cfc7a0a1-4e03-46a4-af89-069a0661cf55'; which gives this error E...

I'm introducing database integrity using innodb constraints in the next version of my application. Everything goes well, but some of my tables have records with deleted references (dead records) an...