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To refresh everyone’s memory, we’ve started talking about SQL JOIN statements over the past few colu

Subqueries are extremely useful, particularly for web-based database applications where you need to

1. Set a password for the “root” user and then rename the user.The first thing you should do with a

This scenario occurs often in applications that need to rank and paginate data by some criterion suc

Despite excessive planning, though, an application is never perfect whenit’s first released. Invaria

That’s fine in some situations but in larger companies, especially thosewith a formal “Corporate IT”

Concepts and LayoutWhen most technical people think of web pages, I suspect that they think ofstatic

IMS is a pure tree structure that the user navigates. This was the basisfor all serious, large-scal

Introduction to aggregatesIf you’ve spent much time using spreadsheets, you’re already familiar with

In the interest of completeness, and to provide a tool that is extremely useful in dealing with hete