Here, we show you how to create a pivot table in Excel to take advantage of one of the application’s most powerful tools. Before we start, just what exactly are pivot tables good for?

the following three grouping & aggregate operations require three SQL statements: select sum(x) from T group by a,b select max(y) from T group by c,d select avg(y),min(z) from T group by a,c Even if ...

It’s common practice to return the results of a scalar function as a column in a SELECT query. SQL Server Enterprise offers “partitioning,” which allows you to split database tables into ...

Learn SQL by Codeacademy is a free and interactive platform that teaches the basics of database essentials such as queries, tables, aggregate functions, developing advanced database queries etc. Each ...

A function to call to determine where the aggregate column will be applied to a given column in the source table. In this case I’m checking to see if a column is type number and only returning a ...