# Information Measurement with SQL Server, Part 4.1: The Kullback-Leibler Divergence

By Steve Bolton
…………This informal series of tutorials on how to implement a hodgepodge of information metrics in SQL Server is...

2018-06-25 (first published: )

# Information Measurement with SQL Server, Part 3: Inverse Probability and Bayes Factors

By Steve Bolton
…………In the last segment of this series of amateur self-tutorials, we discussed how to code various ways of...

2018-03-01

# Information Measurement with SQL Server, Part 2.5: Mutual, Lautum and Shared Information

By Steve Bolton
…………The sample T-SQL I posted in the last article wasn’t as difficult as it looked, considering that it...

2018-02-06 (first published: )

# Information Measurement with SQL Server, Part 2.4: Conditional and Joint Entropy

By Steve Bolton
…………Since this series on using SQL Server to implement the whole gamut of information metrics is wide-ranging in...

2017-11-30

# Information Measurement with SQL Server, Part 2.3: Thermodynamic and Quantum Entropies

By Steve Bolton
…………When I was about 12 years old, I suddenly discovered football. Many lessons still awaited far in the...

2017-11-09 (first published: )

# Information Measurement with SQL Server, Part 2.2: The Rényi Entropy and Its Kin

By Steve Bolton
…………I kicked off this far-ranging series on using SQL Server to quantify information by discussing two of the...

2017-09-22

# Information Measurement with SQL Server, Part 2.1: The Uses and Abuses of Shannon’s Entropy

By Steve Bolton
…………In the first installment of this wide-ranging series of amateur tutorials, I noted that the Hartley function indeed...

2017-08-31

# Information Measurement with SQL Server, Part 1: A Quick Review of the Hartley Function

By Steve Bolton
…………This long-delayed series of amateur self-tutorials has been in the works ever since I began writing my A...

2017-07-28

# Implementing Fuzzy Sets in SQL Server, Part 11: Fuzzy Addenda

By Steve Bolton
…………One of the key reasons I looked into the topic of fuzzy sets in the first place was...

2017-06-30

# Implementing Fuzzy Sets in SQL Server, Part 10.2: Measuring Uncertainty in Evidence Theory

By Steve Bolton
…………To avoid overloading readers with too many concepts at once, I split my discussion of Dempster-Shafer Evidence...

2017-05-31

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### Exploring Windows Function Execution Plans

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## Forums

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Here is my filtered dataset: I would like to calculate the time difference between...

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I have the following in the SQL Errorlog, that was never there before: sp_server_diagnostics...

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By aman

i got the login failed error for user sa, but not always so I...

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## Question of the Day

### Disable Memory Grant Feedback Persistence

In SQL Server 2022, how can I disable memory grant feedback persistence?