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Nullable vs Non-Nullable Columns and Adding Not Null Without Downtime in PostgreSQL

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In this article, we are going to talk about nullable and non-nullable columns specifically related to Postgres databases. While the reasons to use nullable or non-nullable columns may seem obvious at first, there are pitfalls associated with each decision that either affect development velocity, affect application performance, or cause downtime. Let's start with definitions. Nullable […]

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2023-02-03

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Question of the Day

BIT_COUNT() V

What does this return on SQL Server 2025?

select bit_count(null)

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