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NWEEKINYEAR(x;s) number of the week through the year for date-time value x. The default setting for s is 'iso'; this uses the definition of ISO Standard IS-8601 (1988) in which any week (starting on Monday) that lies in more than one year is assigned a week number for the year in which most of its days occur. The alternative setting, 'simple', takes the first week of the year as the one containing 1st January.

Updated on December 4, 2017

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