Category Archives: Azure SQL DB

Azure Storage Accounts – Open to the Internet?

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Let’s get straight to the point. From official documentation it states that “To secure your storage account, you should first configure a rule to deny access to traffic from all networks (including internet traffic) by default. Then, you should configure rules that grant access to traffic from specific vnets. This configuration enables you to build a secure network boundary for your applications”.

Navigate to your storage account, what is the default setting? It is shown below.

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Hot Patching sqlservr.exe in Azure SQL Database

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An amazing blog post by Microsoft describing the idea of hot patching the database engine in Azure SQL Database to allow for minimal downtime when applying patches to SQL Server. We know that it is one of the benefits of Azure SQL Database but now we get some insight into how it’s done.

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SQL Server 2019 – Compatibility Level in Azure

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I am not sure when this became available but for Azure SQL Database 150 compatibility level is now available. Last time I created a database few weeks ago, only level 140 ( SQL Server 2017) was available so I think it is a recent thing.

Upon some testing, if you create a new Azure SQL Database by default it is 150 as per the screen shot below (from the script action command)

defaule150

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Azure SQL Database Clustered Columnstore Index

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You can read about columnstore indexes here (https://azure.microsoft.com/en-gb/blog/transforming-your-data-in-azure-sql-database-to-columnstore-format/). I won’t rehash the material but high level, these index types are optimized for analytical queries and high compression of data (up to 100x). This format is perfect for the large data sets that can be efficiently compressed using this format and analytical queries with complex calculations that use subset of the table columns.

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Azure SQL Elastic Jobs

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The purpose of an Elastic Job is to execute a T-SQL script that is scheduled or executed ad-hoc against a group of Azure SQL databases.  Targets can be in different SQL Database servers, subscriptions, and/or regions. This blog post is quite long and heavy (code wise) so grab a coffee and follow through.

The architecture you could follow is shown below.

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