I have to design a SQL query on an Oracle 10 DB. I want to do it in an elegant way and avoid, if possible, using sub-queries and in the most portable way possible. Basically it's query involving 3 ...

Airbnb has open sourced Airpal, the tool it built to help employees get to data they need to use, reports Gigaom. The software is built on the open source Presto SQL engine, which was created by ...

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 ...

Through the many changes in IT over the years, one constant has always been a concern for performance. With database systems there is especially true. Even with the many advances in relational ...

SQL has dominated data querying for decades. Newer query languages offer more elegance, simplicity, and flexibility for modern use cases. For the last three decades, databases and Structured Query ...