Normalized data giving you problems? Learn how to use the SQL subselect statement and handle your database like a pro!

Any query serves as a table to be queried by any other query, which is why queries may be nested almost infinitely within queries. Anyone who has seen a ten- or twenty-page SQL SELECT statement can ...

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.