This answer to a beautiful Stack Overflow question I've given recently needs further explanation in a blog post. When working with Microsoft Excel, we can create beautiful and also very insightful Pivot Tables with grand totals. What are they? This is best explained visually. Assuming you have this normalised form for your raw data. As … Continue reading Creating a Microsoft Excel Style Pivot Table With Grand Totals in SQL
Tag: cube
How to Calculate Multiple Aggregate Functions in a Single Query
At a customer site, I've recently encountered a report where a programmer needed to count quite a bit of stuff from a single table. The counts all differed in the way they used specific predicates. The report looked roughly like this (as always, I'm using the Sakila database for illustration): -- Total number of films … Continue reading How to Calculate Multiple Aggregate Functions in a Single Query
GROUP BY ROLLUP / CUBE
Every now and then, you come across a requirement that will bring you to your SQL limits. Many of us probably give up early and calculate stuff in Java / [or your language]. Instead, it might've been so easy and fast to do with SQL. If you're working with an advanced database, such as DB2, … Continue reading GROUP BY ROLLUP / CUBE