A lot of people use calendar tables. I’ve blogged about it before. They’re incredibly helpful. Now, have you ever needed a table of minutes?
You’re probably asking, “Jeremiah, why the heck would I ever need a table of minutes?” Well, dear reader, I’m going to tell you that. Please stop interrupting.
Let’s say you have a report. [...]
Putting functions in the where clause of a SQL Statement can cause performance problems. If you aren’t careful, these problems can add up and bring a powerful production system to its knees.
For this example, I’m using the Northwind database, but you could do this on any database.
The first thing to do is put an index [...]
This is a pretty simple process, but one that I thought I would document because I ran into a few gotchas along the way.
I originally installed OS X using the one click installer from EnterpriseDB. Unfortunately, the installer hung while attempting to finish the installation process and they only thing to do was to roll [...]
Refactoring SQL code can be pretty easy. Just like refactoring any other programming language, sometimes you have to look around to find the culprit.
We have a slow running query that frequently times out when run by the users. A quick look at the query told me what was wrong. I found this clause in the [...]
Execution plans are great things. They give us an insight into how SQL Server is putting together queries and why they run slowly.
One immediate thing I look for in an execution plan is a Key Lookup. In a Key Lookup operation, SQL Server has to reference the clustered index on the table because a value [...]
