sql serverÈÕÆÚʱ¼äº¯Êý
Sql ServerÖеÄÈÕÆÚÓëʱ¼äº¯Êý
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
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')
º¯Êý
²ÎÊý/¹¦ÄÜ
GetDate( )
·µ»ØÏµÍ³Ä¿Ç°µÄÈÕÆÚÓëʱ¼ä
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
²ÎÊý intervalµÄÉ趨ֵÈçÏ£º
Öµ
Ëõ д£¨Sql Server£©
(Access ºÍ ASP)
˵Ã÷
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
Day
Dd
d
ÈÕ£¬1-31
W
Ïà¹ØÎĵµ£º
1¡¢Î½´Ê ν´ÊÔÊÐíÄú¹¹ÔìÌõ¼þ£¬ÒÔ±ãÖ»´¦ÀíÂú×ãÕâЩÌõ¼þµÄÄÇЩÐС£
2¡¢Ê¹Óà IN ν´Ê
ʹÓà IN ν´Ê½«Ò»¸öÖµÓëÆäËû¼¸¸öÖµ½øÐбȽϡ£ÀýÈ磺
SELECT NAME from STAFF WHERE DEPT IN (20, 15)
´ËʾÀýÏ൱ÓÚ£º
SELECT NAME from STAFF WHERE DEPT = 20 OR DEPT = 15
µ±×Ó²éѯ·µ»ØÒ»×éֵʱ£¬¿ÉʹÓà IN ºÍ NOT IN ÔËËã·û¡£ÀýÈç£ ......
Ìõ¼þ£º
ÓµÓÐsaȨÏÞ
¿ªÆô xp_cmdshell
·½·¨£º
¿ªÆô/¹Ø±Õ xp_cmdshell ±ØÐëÔÚ master ¿âÖ´ÐÐ
EXEC sp_configure 'show advanced options', 1
RECONFIGURE WITH OVERRIDE
EXEC sp_configure 'xp_cmdshell', 1
RECONFIGURE ......
1 PLS_INTEGER
PLS_INTEGER¿ÉÒÔ´æ´¢Ò»¸öÓзûºÅµÄÕûÐÎÖµ£¬Æä¾«¶È·¶Î§ºÍBINARY_INTEGERÒ»Ñù£¬ÊÇ£º-2^31~2^31¡£
PLS_INTEGERºÍNUMBER±È½ÏÆðÀ´£¬ÆäÓŵãÊÇ£º
1).Õ¼ÓнÏÉٵĴ洢¿Õ¼ä£»
2).¿ÉÒÔÖ±½Ó½øÐÐËãÊõÔËË㣨ÔÚNUMBERÉϲ»ÄÜÖ±½Ó½øÐÐËãÊõÔËË㣬Èç¹ûÒª¼ÆË㣬NUMBER±ØÐëÏȱ»×ª»»³É¶þ½øÖÆ£©¡£ËùÒÔÔÚ½øÐÐËãÊõµÄʱºòPLS_INTEGER ......
Òѳɹ¦Óë·þÎñÆ÷½¨Á¢Á¬½Ó£¬µ«ÊÇÔڵǼǰµÄÎÕÊÖÆÚ¼ä·¢Éú´íÎóµÄ´¦Àí·½·¨
ÔÚÓÃSQL SERVER Óû§µÇ½SQL SERVER 2005ʱ£¬µ¯³öÒ»¸ö¶Ô»°¿ò£¬Ìáʾ" Òѳɹ¦Óë·þÎñÆ÷½¨Á¢Á¬½Ó£¬µ«ÊÇÔڵǼǰµÄÎÕÊÖÆÚ¼ä·¢Éú´íÎó",²éÕÒÁËÒ»ÏÂÔÒò£¬ÔÀ´ÊÇSQL SERVER 2005ʱ½ûÓÃTCP/IPµÇ½ÁË£¬´ò¿ªSQL SERVER 2005²Ë ......