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
5 reads
Bert Wagner
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)
1,315 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
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
11 reads
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)
1,717 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
7 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
10 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)
1,240 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
5 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
5 reads
Blogs
Query Intelligence in SQL Server 2025: What Developers Need to Know
By Chris Yates
When Microsoft announced SQL Server 2025, I was curious about what would truly change...
Finding and Killing Blockers with Redgate AI Tech
By Steve Jones
Redgate has a research arm, called the Foundry, that has been experimenting with AIs...
Back at Small Data SF in 2025
By Steve Jones
Today I’m in San Francisco at Small Data SF 2025. I went to the...
Forums
Large posts full of code not allowed anymore?
Several times now, I've seen a post asking for a solution. I've replied, and...
Data > Hype
Comments posted to this topic are about the item Data > Hype
Create and Read the Analysis Services Flight Recorder
Comments posted to this topic are about the item Create and Read the Analysis...
Question of the Day
Slipstream parameters
What parameters are needed to enable a slipstream installation for setup.exe (SQL Server setup)?
See possible answers