IN vs UNION ALL
Watch this week’s episode on YouTube. When you need to filter query results on multiple values, you probably use an IN() statement or multiple predicates separated by ORs: or...
2019-05-13 (first published: 2019-04-30)
1,271 reads
Bert Wagner
Correlated Subqueries vs Derived Tables
Correlated subqueries provide an intuitive syntax for writing queries that return related data. However, they often perform poorly due to needing to execute once for every value they join on....
2019-05-07 (first published: 2019-04-23)
1,679 reads
Temporary Staging Tables
Watch this week’s episode on YouTube. SQL Server Spool operators are a mixed bag. On one hand, they can negatively impact performance when writing data to disk in tempdb....
2019-05-07
227 reads
Temporary Staging Tables
Watch this week's video on YouTube
SQL Server Spool operators are a mixed bag. On one hand, they can negatively impact performance when writing data to disk in tempdb. On...
2019-05-07
3 reads
IN vs UNION ALL
Watch this week's video on YouTube
When you need to filter query results on multiple values, you probably use an IN() statement or multiple predicates separated by ORs:
WHERE Col1 IN...
2019-04-30
2 reads
Window Functions vs GROUP BYs
There are many options available for improving the performance of a query: indexes, statistics, configuration settings, etc… However, not all environments allow you to use those features (eg. vendor...
2019-04-25 (first published: 2019-04-16)
1,224 reads
Correlated Subqueries vs Derived Tables
Watch this week's video on YouTube
Correlated subqueries provide an intuitive syntax for writing queries that return related data. However, they often perform poorly due to needing to execute once for...
2019-04-23
6 reads
Data Type Precedence and Implicit Conversions
SQL Server needs to make sure data types match when performing operations that involve multiple pieces of data. When the data types do not match, SQL Server has to...
2019-04-22 (first published: 2019-04-09)
667 reads
Testing with Temporary Stored Procedures
A while back I learned that it’s possible to create temporary stored procedures in SQL Server. I never put that knowledge into practice however because I struggled to think of...
2019-04-16 (first published: 2019-04-02)
842 reads
Window Functions vs GROUP BYs
Watch this week's video on YouTube
There are many options available for improving the performance of a query: indexes, statistics, configuration settings, etc...
However, not all environments allow you to use...
2019-04-16
3 reads
Blogs
Microsoft Purview GA menu’s
By James Serra
The new data governance features in Microsoft Purview are now being made generally available...
Connect to Power BI as a Guest User in another Tenant
Sometimes your Microsoft Entra ID account (formerly known as Azure Active Directory) is added...
Parsing EXE Output in PowerShell
By Steve Jones
I saw a post internally that asked this question: Anyone have a handy powershell...
Forums
GIT Configuration and Automated Release for Azure Data Factory
Comments posted to this topic are about the item GIT Configuration and Automated Release...
Azure SQL Managed Instance: RESTORE HEADERONLY is terminating abnormally. (Micro
I'm trying to restore my database into Azure SQL Managed instance from blob storage...
I'm asking for guidance on how to best discover PK-FK relationships
Last night I spent 45 minutes composing a complicated question here. When I finished...
Question of the Day
Concat Addition
What is the result of this code?
SELECT CONCAT(1, 2, 3) + 4See possible answers