mysql composite key in 1 table

I am looking for a skilled freelancer to create a composite key in our MySQL database table. The primary purpose of the composite key is to ensure the uniqueness of a record in the table. We are using MySQL as our database management system. The composite key will include three columns: OID, YEAR, and ID. I need someone who is experienced and reliable in designing complex database systems. This project is time-sensitive, so I need someone who can complete the task quickly and efficiently. Experience with MySQL and composite keys is essential for this job. If you are the right person for this task, please get in touch as soon as possible. Thanks!