Database Design is one of those tasks where you have to carefully get all the major aspects right. If you mess-up just one of these, it can all go horribly wrong. So what are these aspects that can ruin database design, and how can you get them right? Robert Sheldon explains.
2015-03-19
17,062 reads
Greg Larsen discusses the ROLLUP, CUBE and GROUPING SETS operators. These operators are used with the GROUP BY clause and allow you to create subtotals, grand totals and superset of subtotals. Read on to find out more about these additional GROUP BY operators.
2015-03-18
11,340 reads
Behaviour Driven Development (BDD) is not always clearly understood, and the term is particularly unfamiliar in database circles. Seb Rose introduces us to the fundamentals of BDD, and make some suggestions for how it might be relevant to database development.
2015-03-17
8,807 reads
Next to the average and the median, there is another statistical value that you can calculate over a set: the mode. This is the value that appears the most often in the set. The average and the median are straight forward to calculate with T-SQL in SQL Server, but how can we determine the mode using T-SQL?
2015-03-16
6,205 reads
Where applications are evolved by gradually molding them to a growing understanding of the business domain, this presents great challenges to database development. If databases are designed too loosely, and initial errors are allowed to fester, the results become harder and harder to refactor until eventually they constitute a database time bomb. Thomas LeBlanc describes how to avoid a few basic, but very common, database time bombs.
2015-03-13
9,069 reads
Robin Shahan introduces the concepts of snapshots in relation to Azure blob storage. She explains what they're for and how to take them, promote them, and delete them.
2015-03-12
6,823 reads
What is IT Compliance and is it really necessary for contemporary Agile applications to be constrained by the requirements of compliance? William Brewer argues that if the objective is rapid delivery of applications, then compliance controls must be understood as early as possible in development.
2015-03-11
8,251 reads
In this tip Dallas Snider illustrates how to write a T-SQL query that will return rows sorted randomly.
2015-03-10
8,200 reads
Conrad Wolfram is the 'younger Wolfram' of Wolfram Research, the company behind Wolfram|Alpha and Mathematica. He wants to transform the way in which we engage with mathematics. In particular, he would like to reform mathematics education to make greater use of information technology, and he is also leading the way with interactive publishing technology.
2015-03-09
7,173 reads
After finding it difficult to find seriously useful information on Azure blob storage written after Storage Client Library 1.7 (and we’re on 4.something now), Robin Shahan decided to try and fill that gap with this article.
2015-03-06
6,064 reads
By Steve Jones
“Don’t aim to have others like you; aim to have them respect you.” –...
Many years ago, before I joined Oracle, I was working on a major modernisation...
If you work with data pipelines, SQL, notebooks, or machine learning models, a Mac...
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
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In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data:
UserID UserPermissions 15 23 37What is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 3;See possible answers