MySQL Removing Some Foreign keys

Question

I have a table whose primary key is used in several other tables and has several foreign keys to other tables.

CREATE TABLE location (
   locationID INT NOT         


        

Answer 1

Here's a way to drop foreign key constraint, it will work. ALTER TABLE location.location_id DROP FOREIGN KEY location_ibfk_1;

Answer 2

step1: show create table vendor_locations;

step2: ALTER TABLE vendor_locations drop foreign key vendor_locations_ibfk_1;

it worked for me.

Answer 3

Hey I followed some sequence above, and found some solution.

SHOW CREATE TABLE footable;

You will get FK Constrain Name like

ProjectsInfo_ibfk_1

Now you need to remove this constraints. by alter table commantd

alter table ProjectsInfo drop foreign key ProjectsInfo_ibfk_1;

Then drop the table column,

alter table ProjectsInfo drop column clientId;

Answer 4

As everyone said above, you can easily delete a FK. However, I just noticed that it can be necessary to drop the KEY itself at some point. If you have any error message to create another index like the last one, I mean with the same name, it would be useful dropping everything related to that index.

ALTER TABLE your_table_with_fk
  drop FOREIGN KEY name_of_your_fk_from_show_create_table_command_result,
  drop KEY the_same_name_as_above

Answer 5

Try this:

alter table Documents drop
  FK__Documents__Custo__2A4B4B5E

Answer 6

You can not drop the foreign key column because it is being referenced from the table assignmentStuff. So you should first drop the foreign key constraint assignmentStuff.assignmentIDX.

A similar question has already been asked here. Check also here for more info.