A query-expression is one or more table-expressions. Multiple table expressions are linked by set operators. The following figure illustrates the relationship between table-expressions and ...

LINQ, DLinq, and XLinq—what the heck? The last thing you're looking for is more three-letter acronyms (TLAs) and fancy, four-letter acronyms (FFLAs). But once you do bit of plumbing, C# anonymous ...

The Query window assigns aliases to the tables and columns. An alias is a temporary, alternate name for a table. If you select two tables that have columns with the same name, the aliases are used so ...

You don't need a complex set of expressions or even VBA to sort Access date values by specific components, such as month or year. Use DatePart() and sort on its results. When grouping date values at ...

Query processing and user interaction form the cornerstone of modern database systems, providing the framework for translating high‐level user queries into efficient, actionable operations. As data ...