In the previous post we looked at how to use the CROSS APPLY and OUTER APPLY operators as alternative to a JOIN in queries with some examples. As we wrapped that up I also mentioned that there can be drawbacks to using APPLY in our queries, particularly when we’re working with large data sets. The issue is due to the way that the right hand […]
When joining data in SQL we have a number of options to us including INNER and OUTER joins, but one of the ones I tend to use less frequently is the APPLY operator, specifically the CROSS APPLY and OUTER APPLY operators. As with other types of joins they operate slightly differently and have considerations which should be taken into account when deciding on the output […]
The UPDATE and DELETE statements allow us to manage the data within our databases and being able to use them effectively is key. There was recently a question from a junior developer asking about how to perform data changes when table joins are required so I thought it a good opportunity to put forward some more thought out details […]
A few weeks back we looked at altering an object inside our database and changing the schema in which it resides. Whilst the ALTER SCHEMA … TRANSFER statement itself is straightforward, there are some gotchas you might find as a result of the change which I thought it was worth covering. To set up for what we’re going […]
Last time out we looked at referencing tables across databases. While we of course have the option of using three-part naming to address the table, we also considered views and synonyms as two alternative options. Both of these can be used to achieve similar results. There are elements which they have in common and others which […]
In SQL Server we’ll typically end up using environments containing multiple databases which happen to have data which relate to each other. Due to this there will be times when we’ll need to reference objects in another database when writing a query. What options do we have for doing this? Here we’ll look at three […]
This months’ invitation from Steve Jones asks us to write about producing SQL dynamically in some form or another. We can create and execute SQL dynamically within our procedures but what about dynamically creating it from other sources before passing it into SQL Server? The quick I have to admit that Steve’s mention of using Excel […]
We’ve previously looked at the basics of using schemas in SQL Server where we created a schema and used objects inside of it. If you’re not dealing with new objects though and wanted to move something into or out of a schema how to we go about that? Not by renaming it For renaming most objects within […]
As Deborah’s invitation opens this month she quite rightly points out that there are a lot of professionals out there who have a few (passionate) opinions about what they do or the way they do it. This month we’re invited to … well, have a rant – a rant about those experiences which have shaped […]
Following on from previous posts where we looked at Dynamic Data Masking, how to use it, and the challenges we may encounter, there’s one last area I wanted to touch on. With the arrival of SQL Server 2022 the masking functionality has been extended so we have an additional masking function and more granular permissions […]
Andy Brownsword 