Structured Query Language (SQL) is a standardized programming language that is used to manage relational databases and perform various operations on the data in them. Initially created in the 1970s, ...

The MySQL SELECT statement controls which columns and values appear in query results, making it one of the most important commands for working with database tables. This lesson covers selecting all ...

Don't be afraid of using your chosen database's command-line client. I might as well say this up front: I don't like using GUI (aka non-command-line or graphical) tools with my databases. This is ...

Here's a look at different ways to query Hadoop via SQL, some of which are part of the latest edition of MapR's Hadoop distribution SQL: old and busted. Hadoop: new hotness. That’s the conventional ...

What is CQRS (command query responsibility segregation)? CQRS (command query responsibility segregation) is a programming design and architectural pattern that treats retrieving data and changing data ...

A new comparison explains operational statistics, query plans and troubleshooting tools for teams considering SQL migration.