PostgreSQL window functions make it possible to rank records, calculate running totals, and analyze data without combining ...

I already have a solution for this, but it's not elegant. I'm curious if other people have "cleaner" solutions. My goal is less to make this specific problem better, but more to find a nicer way to ...

A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...

When dealing with massive quantities of data, top-k queries are a powerful technique for returning only the k most relevant tuples for inspection, based on a scoring function. The problem of ...

SQL is a convenient way to manage and query your data, but badly written queries can tie up your database. Here are seven common SQL traps and how to avoid them. Database developers have it tough.