Immutable databases

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Ninja Immutable Databases

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'Immutable' databases operate under the principle that data or objects should not be modified after they are created. Once again they hold the promise of providing strong consistency combined with horizontal read scalability, and built-in caching. Are Immutable databases a new idea? Are they different in any way from the mainstream RDBMSs?

2014-10-03

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Question of the Day

Missing the Jaro Winkler Distance

I upgraded a SQL Server 2019 instance to SQL Server 2025. I wanted to test the fuzzy string search functions. I run this code:

SELECT JARO_WINKLER_DISTANCE('tim', 'tom')
I get this error message:
Msg 195, Level 15, State 10, Line 1 'JARO_WINKLER_DISTANCE' is not a recognized built-in function name.
What is wrong?

See possible answers