Speed Up Your SQL Queries with Covering Indexes
Think about searching for a contact in your phone. You can either scroll through everything or jump straight to a specific letter. That’s basically the difference between regular database access and using covering indexes in SQL. They can make your queries run way faster, but many developers don’t know about them or use them properly. Let’s talk about what they are and when you should use them. What is a Covering Index? A covering index is simply an index that has all the columns your query needs, so the database doesn’t have to go back to the actual table. W ...