How to Drop a Foreign Key Column Without Error 1025 in MySQL?

Renaming Foreign Key Column Raises Error: Solution

Question:

I have a MySQL table with a primary key referencing multiple other tables, and several foreign keys referencing other tables. When attempting to remove one of the foreign key columns, I encounter an "Error 1025: Error on rename" message. How can I drop the column without this error?

Answer:

The issue arises from the use of the column index name instead of the constraint name when attempting to drop the foreign key. The correct approach is to specify the constraint name, as demonstrated below:

ALTER TABLE assignment DROP FOREIGN KEY locationIDX;

The syntax for removing a foreign key constraint is:

ALTER TABLE table_name DROP FOREIGN KEY constraint_name;

Ensure to replace "table_name" with the name of the table containing the foreign key and "constraint_name" with the actual name of the constraint.

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