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2. dateadd ÔÚÏòÖ¸¶¨ÈÕÆÚ¼ÓÉÏÒ»¶Îʱ¼äµÄ»ù´¡ÉÏ£¬·µ»ØÐ嵀 datetime Öµ
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select dateadd(day,2,'2004-10-15') --·µ»Ø£º2004-10-17 00:00:00.000
3. datediff ·µ»Ø¿çÁ½¸öÖ¸¶¨ÈÕÆÚµÄÈÕÆÚºÍʱ¼ä±ß½çÊý¡£
select datediff(day,'2004-09-01','2004-09-18') --·µ»Ø£º17
4. datepart ·µ»Ø´ú±íÖ¸¶¨ÈÕÆÚµÄÖ¸¶¨ÈÕÆÚ²¿·ÖµÄÕûÊý¡£
SELECT DATEPART(month, '2004-10-15') --·µ»Ø 10
5. datename ·µ»Ø´ú±íÖ¸¶¨ÈÕÆÚµÄÖ¸¶¨ÈÕÆÚ²¿·ÖµÄ×Ö·û´®
SELECT datename(weekday, '2004-10-15') --·µ»Ø£ºÐÇÆÚÎå
6. day(), month(),year() --¿ÉÒÔÓëdatepart¶ÔÕÕÒ»ÏÂ
select µ±Ç°ÈÕÆÚ=convert(varchar(10),getdate(),120)
,µ±Ç°Ê±¼ä=convert(varchar(8),getdate(),114)
select datename(dw,'2004-10-15')
select ±¾ÄêµÚ¶àÉÙÖÜ=datename(week,'2004-10-15')
,½ñÌìÊÇÖܼ¸=datename(weekday,'2004-10-15')
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GetDate( ) ·µ»ØϵͳĿǰµÄÈÕÆÚÓëʱ¼ä
DateDiff (interval,date1,date2) ÒÔinterval Ö¸¶¨µÄ·½Ê½£¬·µ»Ødate2 Óëdate1Á½¸öÈÕÆÚÖ®¼äµÄ²îÖµ date2-date1
DateAdd (interval,number,date) ÒÔintervalÖ¸¶¨µÄ·½Ê½£¬¼ÓÉÏnumberÖ®ºóµÄÈÕÆÚ
DatePart (interval,date) ·µ»ØÈÕÆÚdateÖУ¬intervalÖ¸¶¨²¿·ÖËù¶ÔÓ¦µÄÕûÊýÖµ
DateName (interval,date) ·µ»ØÈÕÆÚdateÖУ¬intervalÖ¸¶¨²¿·ÖËù¶ÔÓ¦µÄ×Ö·û´®Ãû³Æ
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Year Yy yyyy Äê 1753 ~ 9999
Quarter Qq q ¼¾ 1 ~ 4
Month Mm m ÔÂ1 ~ 12
Day of year Dy y Ò»ÄêµÄÈÕÊý,Ò»ÄêÖеĵڼ¸ÈÕ 1-366
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Hour Hh h ʱ0 ~ 23
Minute Mi n ·ÖÖÓ0 ~ 59
Second Ss s Ãë 0 ~ 59
Millisecond Ms - ºÁÃë 0 ~ 999
access ºÍ asp ÖÐÓÃdate()ºÍnow()È¡µÃϵͳÈÕÆÚʱ¼ä£»ÆäÖÐDateDiff,DateAdd,DatePartҲͬÊÇÄÜÓÃÓÚAccessºÍaspÖУ¬ÕâЩº¯ÊýµÄÓ÷¨Ò²ÀàËÆ
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1.GetDate() ÓÃÓÚsql server :select GetDate()
2.DateDiff('s','2005-07-20','2005-7-25 22:56:32')·µ»ØֵΪ 514592 Ãë
DateDiff('d','2005-07-20','2005-7-25 22:56:32')·µ»ØֵΪ 5 Ìì
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SQL Server JDBC Deriver Problems

If the SQL data type is 'timestamp', we need to use ResultSet.getBytes() to retrieve its value. If the SQL data type is 'datetime', we can use ResultSet.getTimestamp(). It is said timestamp is interanlly saved as binary data.
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