datediff sql

DATEDIFF函数是SQL Server中的一个函数，用于计算两个日期之间的差距。它可以计算两个日期之间的年数、月数、周数、天数、小时数、分钟数、秒数等。例如，使用DATEDIFF函数可以计算出两个日期之间的天数差异，
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