Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

sql DATEPART£¨£©º¯Êý

cdateÊÇdatetimeÀàÐ͵Ä×Ö¶Î
ͳ¼ÆÒ»ÄêµÄÈçÏÂ
 select datepart(yy,cdate) as 'Ô·Ý',sum(cmoney) from consumption group by datepart(yy,cdate)
ͳ¼ÆÒ»ÔµÄÈçÏÂ
 select datepart(mm,cdate) as 'Ô·Ý',sum(cmoney) from consumption where datepart(yy,cdate)=2009 group by datepart(mm,cdate)
ͳ¼ÆÒ»ÖܵÄÈçÏÂ
select DATEPART(wk,cdate) as 'ÖÜ', sum(cmoney) from consumption group by DATEPART(wk,cdate)
ͳ¼ÆÒ»ÌìµÄÈçÏÂ
select DATEPART(dd,cdate) as 'ºÅ', sum(cmoney) from consumption  where datepart(mm,cdate)=6  group by DATEPART(dd,cdate)
ÒÔÉÏÓõ½µÄ¾ÍÊÇ“DATEPART£¨£©”º¯Êý¡£º¯ÊýDATEPART£¨£©µÄ²ÎÊýÊÇÁ½¸ö±äÁ¿¡£µÚÒ»¸ö±äÁ¿Ö¸¶¨Òª³éÈ¡ÈÕÆÚµÄÄÄÒ»²¿·Ö£»µÚ¶þ¸ö±äÁ¿ÊÇʵ¼ÊµÄÊý¾Ý¡£
ÈÕÆÚµÄ¸÷²¿·Ö¼°Æä¼òд
ÈÕÆÚ²¿·Ö           ¼òд               Öµ
year                yy                1753--9999
quarter             qq                1--4
month               mm                1--12
day of year         dy                1--366
day                 dd                1--31
week                wk              &n


Ïà¹ØÎĵµ£º

ÈçºÎ»Ö¸´MS SQLÊý¾Ý¿âµÄMDFÎļþ

參¿¼: http://blog.sina.com.cn/s/blog_59b11d010100af1n.html
ÈçºÎ»Ö¸´/ÐÞ¸´MS SQLÊý¾Ý¿âµÄMDFÎļþ
Èç¹û±¸·ÝµÄÊý¾Ý¿âÓÐ2¸öÎļþ£¬·Ö±ðÊÇ.LDF ºÍ .MDF£¬´ò¿ªÆóÒµ¹ÜÀíÆ÷£¬ÔÚʵÀýÉÏÓÒ»÷---ËùÓÐÈÎÎñ--¸½¼ÓÊý¾Ý¿â£¬È»ºóÑ¡ÔñÄǸö.MDFÎļþ£¬¾Í¿ÉÒÔÁË¡£
¡¡¡¡»òÕßÔÚ²éѯ·ÖÎöÆ÷ÖÐÊäÈ룺
¡¡¡¡sp_attach_db "Êý¾Ý¿âÃû³Æ" ......

¼¸ÌõÓÐÓõÄSqlÓï¾ä

1. Sql  ÑÓʱºòÖ´ÐÐ
a. ÈýÊ®ÃëºóÖ´ÐÐ WAITFOR DELAY  ºóÃæµÄÓï¾ä
WAITFOR DELAY '00:00:30'
b. 10:00·Ö¿ªÊ¼Ö´ÐкóÃæµÄ´úÂë
WAITFOR TIME '10:00';
 
2.  ÊÕËõÊý¾Ý¿â£¬Ê¹Æä¿ÕÓà¿Õ¼äΪ0%
DBCC SHRINKDATABASE (DataBaseName,0)
3.  È¡µÃÊý¾Ý¿âÎļþËùÔÚµÄÅÌ·û
declare @dirverNam ......

SQLÏÂÈÕÆÚº¯ÊýʹÓÃ

ÕâÁ½Ììдһ¸öºÍͳ¼ÆÊý¾ÝÓйصĴ洢¹ý³Ì£¬ÀïÃæÒªÀûÓÃÈÕÆÚ½øÐÐһЩ¼ÆËãºÍÅжϣ¬Ò²×ÔȻҪÀûÓÃSQLµÄһЩÈÕÆÚÏà¹ØµÄº¯Êý¡£ÕâÀïÂÔ¼Çһϣ¬µ±ÊǸ´Ï°Ò»ÏÂSQL¡£
ÀûÓÃSQL½Å±¾ÄÚÖõöº¯Êý£¬ÎÒÃÇÄÜÁé»îµÄ¶ÔÈÕÆÚ½øÐмÆËãºÍ±È½Ï¡£³£Óõöº¯Êý£ºGETDATE(),DATEDIFF(),DATEADD()
GETDATE() µ±È»¹ËÃû˼Ò壬µÃµ½µ±Ç°µÄÈÕÆÚ£¬·µ»ØÀàÐÍÊ ......

jbossƽ̨ÏÂjspÁ¬½Ósql2005ºÍsql2000

1¡¢ÅäÖÃjava»·¾³£¬MyEclipse7.0¡£ÅäÖÃjboss5.0£¬Õ¹¿ªÑ¡ÔñjdkΪÒѰ²×°µÄjdk·¾¶¡£
2¡¢°²×°2005ºÍsql2000£¬×°2000ʱҪװsp4.Çý¶¯Ñ¡Ôñjdbc2.0¡£ÔÙ×°2000ʱʵÀýÃû×Ô¼ºÊäÈëÒ»¸ö¡£ÕâÀïµÄÎÊÌâ¾ÍÊǵǼÃûºÍÃÜÂëµÄÉèÖã¬ÓÒ»÷“SQL   Server×é”ϵÄʵÀýÃû£¨Windows   NT)"µÄ“ÊôÐÔ”£¬ÔÚµ¯³öµÄ¶Ô»°¿ò ......

³£¼ûOracle HINTµÄÓ÷¨ SQLÓÅ»¯

ÔÚSQLÓï¾äÓÅ»¯¹ý³ÌÖУ¬ÎÒÃǾ­³£»áÓõ½hint,ÏÖ×ܽáÒ»ÏÂÔÚSQLÓÅ»¯¹ý³ÌÖг£¼ûOracle HINTµÄÓ÷¨£º
1. /*+ALL_ROWS*/
±íÃ÷¶ÔÓï¾ä¿éÑ¡Ôñ»ùÓÚ¿ªÏúµÄÓÅ»¯·½·¨,²¢»ñµÃ×î¼ÑÍÌÍÂÁ¿,ʹ×ÊÔ´ÏûºÄ×îС»¯.
ÀýÈç:
SELECT /*+ALL+_ROWS*/ EMP_NO,EMP_NAM,DAT_IN from BSEMPMS WHERE EMP_NO=’SCOTT’;
2. /*+FIRST_ROWS*/
±í ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ