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I am trying to do the simplest of tasks, adding a single relationship to my table and having no luck in the process.

I have two tables, one users and the other user_business.

user_business is additional, optional details that a users can have.

For this situation, I was going to make it a 1-1 identifying relationship since you can’t have additional details without a user.

In the tool I am using, MySQL Workbench, I clicked on the 1 - - - 1 icon and selected both tables. I tried selecting them both in the opposite order to rule that out.

Once the relationship has been created, I try to update a record that is in user_business with a value of 0 on the userid to a value of 1 which will match the id of the user in the users table.

When I do this, I get the following error:

Operation failed: std::exception Executing: UPDATE crowd.user_business SET userid=’1′ WHERE userid=’0′;

ERROR 1451: 1451: Cannot delete or update a parent row: a foreign key constraint fails (`crowd`.`users`, CONSTRAINT `fk_users_user_business` FOREIGN KEY (`user_business_userid`) REFERENCES `user_business` (`userid`) ON DELETE NO ACTION ON UPDATE NO ACTION) SQL Statement: UPDATE `crowd`.`user_business` SET `userid`='1' WHERE `userid`='0' 

enter image description here

ID in users is userid in user_business. What step am I missing here?

UPDATE

After hovering over every icon, I found one that allows me to create relationships between existing columns. I think that was what I needed this whole time. Will update if this is not the case.

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