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Fun With OPENROWSET
I’ve had several occasions to use OPENROWSET recently in T-SQL. Although you can use it as an ad hoc alternative to a linked server to query a relational database, I’m finding it useful to get data...
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Biml for a Type 1 Slowly Changing Dimension
I’ve been working on building my Biml library over the last few months. One of the first design patterns I created was a Type 1 Slowly Changing Dimension where all fields except the key fields that...
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Notes and Tips on SQL Server Spatial Data Types
I’ve been working on a project that includes geographical data representing stops on a delivery route. I’ve just completed loading this data into a data mart. The source data contains longitude and...
View ArticleCreate a Date Dimension in Azure SQL Data Warehouse
Most data warehouses and data marts require a date dimension or calendar table. Those of us that have been building data warehouses in SQL Server for a while have collected our favorite scripts to...
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What You Need to Know About Data Classifications in Azure SQL Data Warehouse
Data classifications in Azure SQL DW entered public preview in March 2019. They allow you to label columns in your data warehouse with their information type and sensitivity level. There are built-in...
View ArticleWhy We Don’t Truncate Dimensions and Facts During a Data Load
Every once in a while, I come across a data warehouse where the data load uses a full truncate and reload pattern to populate a fact or dimension. While it may not be the end of the world for a small...
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Altering a Computed Column in a Temporal Table in Azure SQL
System-versioned temporal tables were introduced in SQL Server 2016. They provide information about data stored in the table at any point in time by storing an effective dated version of each row...
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