SQL ServerÈÕÆÚ²Ù×÷

1¡¢²éѯÁ½¸öʱ¼äÖ®¼ä
select * from [tablename] where date between \'value1\' and \'value2\'
 
2¡¢ÏÔʾ×îºó»Ø¸´Ê±¼ä
select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b
 
3¡¢Èճ̰²ÅÅÌáÇ°5·ÖÖÓÌáÐÑ
select * from Èճ̰²ÅÅ where datediff('minute',f¿ªÊ¼Ê±¼ä,getdate())>5
 
4¡¢ÅжÏÊÇ·ñΪÈòÄê
SELECT case day(dateadd(mm, 2, dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)))) when 28 then 'ƽÄê' else 'ÈòÄê' end
 
5¡¢±È½Ï2¸öÈÕÆÚ²îСÓÚ1·ÖÖÓ¡£ÈÕÆÚ¸ñʽΪyyyy-MM-dd HH:mm:ss
DATEDIFF(MS,TIME1,TIME2)<1
 
6¡¢»ñÈ¡µ±ÔÂ×ÜÌìÊý
select DATEDIFF(dd,getdate(),DATEADD(mm, 1, getdate()))
select datediff(day,dateadd(mm, datediff(mm,'',getdate()), ''),
dateadd(mm, datediff(mm,'',getdate()), '1900-02-01'))
 
--WAITFOR
--Àý µÈ´ý1 Сʱ2 ·ÖÁã3 Ãëºó²ÅÖ´ÐÐSELECT Óï¾ä
waitfor delay ’01:02:03’
select * from employee
--Àý µÈµ½ÍíÉÏ11 µãÁã8 ·Öºó²ÅÖ´ÐÐSELECT Óï¾ä
waitfor time ’23:08:00’
select * from employee
 
1.      µ±Ç°ÏµÍ³ÈÕÆÚ¡¢Ê±¼ä
        select getdate()
2. dateadd      ÔÚÏòÖ¸¶¨ÈÕÆÚ¼ÓÉÏÒ»¶Îʱ¼äµÄ»ù´¡ÉÏ£¬·µ»ØÐ嵀 datetime Öµ
       ÀýÈ磺ÏòÈÕÆÚ¼ÓÉÏ2Ìì
       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
       select datediff(day,'2004-09-18','2004-09-01')       --·µ»Ø£º-17
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´®