I'm using MySQL, and I need to know how to create a primary key for a table that contains more than one attribute....
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
For example, I would want both the last_name and first_name attributes to be a singular primary key.
MySQL supports multi-column primary keys just like other popular database management systems. If you haven't originally defined the table with a primary key, you can ALTER the table with syntax similar to the following:
alter table MyTable add primary key (Last_Name, First_Name);
For More Information
- What do you think about this answer? E-mail the edtiors at editor@searchDatabase.com with your feedback.
- The Best SQL Web Links: tips, tutorials, scripts, and more.
- Have an SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical SQL questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
Dig Deeper on Oracle and SQL
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.