Using a computed column in a table allows you to have a calculation pre-baked into your schema. They also allow you to choose if you’d like that calculated value to be physically stored within the table (persisted) or to be calculated each time you query the table. To demonstrate this we’ll use a small sales […]
When it comes to removing data from a heap its pretty similar to removing it from a regular table: That’s all folks! Wait, or would you like your data pages back too? Yea, it might not be quite that easy… You see, when you remove a small number of records from a heap you’ll find […]
If you’ve ran sp_BlitzIndex before you might have come across some warnings about self-loathing heaps and maybe you’re looking to put a clustering key on them. Generally that’s a good idea to consider but it can cause issues if the data needed to be in that specific order. In this instance it turned out there […]
Dealing with duplicate records can be a headache when you’re expecting them to be unique and at some point the application or report users start to question why they’re seeing the same customer or product appearing twice. Once you’ve tracked them down you typically want to get rid of them and sometimes you’ll find an […]
The ask this month is to share go-to short code snippets with the community. I think its right to start by showing appreciation for some of the widely adopted tooling in the community such as sp_WhoIsActive, the First Responder Kit, Ola’s Maintenance Solution and DbaTools. Without these available we wouldn’t have half the snippets and […]
We’ve all got those go-to queries – maybe its for the data warehouse where you need a dozen joins, or it could be that maintenance script where you need the parameters set in a specific way. They’ve been used so often we can either script them from memory or we know exactly where the scripts […]
Sometimes you find a large table where data is building up and the history is getting less relevant by the day. The size might be consuming valuable storage, increasing your backup window, maintenance window, or query run times (everyone uses a WHERE clause, surely?). It might have been around for a while and the creator […]
Renaming tables, that’s easy right? Renaming a Table Performing the rename of a table is straight forward in Management Studio via Object Explorer. You can simply select the table and right click and Rename (or press F2) and edit the name right there and then. Hit return and we’re good to go. If you’re scripting […]
Comments are a wonderful thing whether it’s keeping track of your thoughts in a drawn out stored procedure, or leaving some breadcrumbs to follow when revisiting code in the future. There is, however, a slightly uglier side to these when you’re trying to look at queries as they run. Let’s suppose we’re running a very […]
Andy Brownsword 