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
239 reads
Bert Wagner
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
8 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
8 reads
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)
1,320 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
5 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
14 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)
1,721 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
9 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
13 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)
1,246 reads
Blogs
Are you getting value from your reporting?
By ChrisJenkins
Do you spend so long manipulating your data into something vaguely useful that you...
The Book of Redgate: SQL Server Central
By Steve Jones
It was neat to stumble on this in the book, a piece by me,...
Git forked
Forgive me for the title. Mentally I’m 12. When I started my current day...
Forums
Microsoft Security Changes and SQL Server
Comments posted to this topic are about the item Microsoft Security Changes and SQL...
Expanding into Print
Comments posted to this topic are about the item Expanding into Print
Downtime Caused by the Postgres Transaction ID Wraparound Problem
Comments posted to this topic are about the item Downtime Caused by the Postgres...
Question of the Day
The String Distance I
In SQL Server 2025, what is returned by this code:
SELECT EDIT_DISTANCE('Steve', 'Stan')
Assume preview features are enabled. See possible answers