Technical Article

Return WeekNo (ISO 8601 standard)

In MS SQL, January 1 of any year defines the starting number for the week. The DATEPART(wk, 'Jan 1, xxxx') always return 1. However, a lot of reports Week No is actually based on ISO 8601 standard, that is January 1 of any year can be Week 53/52 or Week 1. (http://www.merlyn.demon.co.uk/weekinfo.htm#IDC)The Rule is as […]

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2005-06-14 (first published: )

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The Decoded Value

In SQL Server 2025, what is returned from this code:

DECLARE @message VARCHAR(50) = 'Hello SQL Server 2025!';
DECLARE @encoded VARCHAR(MAX);

SET @encoded = BASE64_ENCODE(CAST(@message AS VARBINARY(1000)));
SELECT BASE64_DECODE(@encoded) 

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