Question

I have a column in my database called ‘category’ that contains the name of the individual category that each blog post is in (‘cars’,’books’,’movies’).

I need to create a list that contains each of these categories.

When I query the database and echo all my categories I get a list with many duplicates (as expected).

Example:

• books
• books
• books
• cars
• movies
• movies

But what if I just want to display each individual category. How is this done? Can somebody point me to an online resource for this.

example:

• books
• cars
• movies

Answer 1

Use the DISTINCT keyword:

SELECT DISTINCT category FROM posts;