Markus Winand
winand.at
SQL Renaissance Ambassador. Author, Trainer, Coach. PhD in Common Sense. Creator of http://use-the-index-luke.com and http://modern-sql.com.
👤 Joined on 22 November 2023
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- 22 Kas 2023, 05:35
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@markuswinand.bsky.social - 27 Kas 2023, 10:46
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In Vienna and Beijing, the first (thorium) nuclear clocks begin to tick https://www.nytimes.com/2026/10/07/science/first-nuclear-clocks-thorium-229.html https://news.ycombinator.com/item?id=49996406
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I recommend this book to anyone working with a database.
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turning my head to the bookshelf on the right - oh look I own this book 😊 Can only recommend it :)
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NULL indicates the absence of a value in #SQL It's used for many reasons, so you need to learn its quirks @winand.at covers Comparisons Mapping to and from null Expressions propagation Aggregate functions Grouping Sorting Unique constraints buff.ly/V6S9wAL
Show PostThere's much more to defining primary keys than using surrogate id columns @winand.at introduces Structured Primary Keys These are based on foreign keys plus the columns needed for uniqueness Using these can give big performance and functional benefits
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