![](/uploads/posts/2023-09/thumbs/1695495158_sql-server-analytical-toolkit.jpg)
Автор: Angelo Bobak
Издательство: Apress
Год: 2023
Страниц: 1069
Язык: английский
Формат: pdf
Размер: 84.1 MB
This is a book on applying Microsoft SQL Server aggregate, analytical, and ranking functions across various industries for the purpose of statistical, reporting, analytical, and historical performance analysis using a series of built-in SQL Server functions affectionately known as the window functions! No, not window functions like the ones used in the C# or other Microsoft Windows application programming. They are called window functions because they implement windows into the data set generated by a query. These windows allow you to control where the functions are applied in the data by creating partitions in the query data set. “What’s a partition?” you might ask. This is a key concept you need to understand to get the most out of this book. Suppose you have a data set that has six rows for product category A and six rows for product category B. Each row has a column that stores sales values that you wish to analyze. The data set can be divided into two sections, one for each product category. These are the partitions that the window functions use. For intermediate to advanced SQL Server developers and data architects.