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DATEDIFF() º¯Êý·µ»ØÁ½¸öÈÕÆÚÖ®¼äµÄÌìÊý¡£
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DATEDIFF(datepart,startdate,enddate)
startdate ºÍ enddate ²ÎÊýÊǺϷ¨µÄÈÕÆÚ±í´ïʽ¡£
datepart ²ÎÊý¿ÉÒÔÊÇÏÂÁеÄÖµ£º
datepart
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yy, yyyy
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qq, q
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mm, m
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dy, y
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dd, d
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wk, ww
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dw, w
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hh
·ÖÖÓ
mi, n
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ss, s
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ms
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mcs
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ns
select convert(varchar,datediff(s,'2009-12-15',getdate())/3600)+'Сʱ'+
convert(varchar,datediff(s,'2009-12-15',getdate())%3600/60)
+'·ÖÖÓ'
+
convert(varchar,datediff(s,'2009-12-15',getdate())%3600%60)
+'Ãë'


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2010-05-05 13:35:52.06 Server Microsoft SQL Server 2005 - 9.00.1399.06 (Intel X86)
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Stud_ID
Course_ID
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1
1
2
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SQL 2005 ´æ´¢¹ý³Ì µ÷ÊÔ

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