2009-10-28
3,945 reads
T-SQL
2009-10-26
4,502 reads
2009-10-21
5,087 reads
2009-10-19
3,635 reads
Causation, Correlation and Crackpots
Joe Celko explores the dangers of muddling correlation and causation, emphasises the importance of determining how likely it is that a correlation has occurred by chance, and gets stuck into calculating correlation coefficients in SQL. Along the way, Joe illustrates the consequences of leaping to the wrong conclusion from correlations with tales of Pop Dread.
2009-10-19
2,136 reads
2009-10-16
5,102 reads
2009-10-14
4,697 reads
Concatenating Rows
Often in database design we store different values in rows to take advantage of a normalized design. However many times we need to combine multiple rows of data into one row for a report of some sort. New author Carl P. Anderson brings us some interesting T-SQL code to accomplish this.
2011-03-04 (first published: 2009-10-14)
150,389 reads
SQL and the JOIN Operator
How the JOIN operator works, the different types of JOINs and relevant information about joining tables.
2011-03-03 (first published: 2009-10-07)
47,590 reads
Retrieve consecutive records from the table based the value difference
Retrieve consecutive records from the table based the value difference
2009-11-04 (first published: 2009-10-06)
947 reads
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Forums
The day-to-day pressures of a DBA team, and how we can work smarter with automation and AI
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Migrate SSRS Reports to PowerBI Report Server in SQL Server 2025
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Identities and Sequences III
Comments posted to this topic are about the item Identities and Sequences III
Question of the Day
Identities and Sequences III
When thinking of the Identity property for auto incrementing columns and sequences for the same action, which can be used with the BIGINT data type?
See possible answers