Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ɾ³ýsql 2005 ÈÕÖ¾

1¡¢½Ø¶ÏÈÕÖ¾£º  
  backup   log   Êý¾Ý¿â   with   no_log  
   
  »ò£º  
  Çå¿ÕÈÕÖ¾  
  DUMP     TRANSACTION     ¿âÃû     WITH     NO_LOG    
   
  2¡¢  
  ÆóÒµ¹ÜÀíÆ÷--ÓÒ¼üÄãҪѹËõµÄÊý¾Ý¿â--ËùÓÐÈÎÎñ--ÊÕËõÊý¾Ý¿â--ÊÕËõÎļþ--Ñ¡ÔñÈÕÖ¾Îļþ--ÔÚÊÕËõ·½Ê½ÀïÑ¡ÔñÊÕËõÖÁXXM,ÕâÀï»á¸ø³öÒ»¸öÔÊÐíÊÕËõµ½µÄ×îСMÊý,Ö±½ÓÊäÈëÕâ¸öÊý,È·¶¨¾Í¿ÉÒÔÁË


Ïà¹ØÎĵµ£º

AccessºÍSQL2000ÖÐÓï¾äµÄÇø±ð

1 £¬¶ÔÓÚÈÕÆÚ×Ö¶Î×Ö¶Î
access±íʾΪ£º#1981-28-12#
SQLSERVER2000±íʾΪ£º''1981-02-12''
2,SQLÓï¾äÇø±ð£¬select ,update ÔÚ¶Ôµ¥±í²Ù×÷ʱ¶¼²î²»¶à£¬
µ«¶à±í²Ù×÷ʱupdateÓï¾äµÄÇø±ðACCESSÓëSQLSERVERÖеÄUpdateÓï¾ä¶Ô±È:
SQLSERVERÖиüжà±íµÄUpdateÓï¾ä:
Update Tab1
SET a.Name = b.Name
from Tab1 a,Tab2 b
Whe ......

SQLSERVER SQLÐÔÄÜÓÅ»¯

1.Ñ¡Ôñ×îÓÐЧÂʵıíÃû˳Ðò(Ö»ÔÚ»ùÓÚ¹æÔòµÄÓÅ»¯Æ÷ÖÐÓÐЧ)¡¡¡¡
¡¡¡¡ SQLSERVERµÄ½âÎöÆ÷°´ÕÕ´ÓÓÒµ½×óµÄ˳Ðò´¦Àífrom×Ó¾äÖеıíÃû£¬Òò´Ëfrom×Ó¾äÖÐдÔÚ×îºóµÄ±í£¨»ù´¡±ídriving table£©½«±»×îÏÈ´¦Àí£¬ÔÚfrom×Ó¾äÖаüº¬¶à¸ö±íµÄÇé¿öÏ£¬±ØÐëÑ¡Ôñ¼Ç¼ÌõÊý×îÉٵıí×÷Ϊ»ù´¡±í£¬µ±SQLSERVER´¦Àí¶à¸ö±íʱ£¬»áÔËÓÃÅÅÐò¼°ºÏ²¢µÄ·½Ê½Á ......

¸ßЧµÄSQLÓï¾äÖ®·ÖÎöº¯Êý

¸ßЧµÄSQLÓï¾äÖ®·ÖÎöº¯Êý--row_number() /rank()/dense_rank
Oracle·ÖÎöº¯ÊýRANK(),ROW_NUMBER(),LAG()µÈµÄʹÓ÷½·¨
ROW_NUMBER() OVER (PARTITION BY COL1 ORDER BY COL2)
±íʾ¸ù¾ÝCOL1·Ö×飬ÔÚ·Ö×éÄÚ²¿¸ù¾Ý COL2ÅÅÐò
¶øÕâ¸öÖµ¾Í±íʾÿ×éÄÚ²¿ÅÅÐòºóµÄ˳Ðò±àºÅ£¨×éÄÚÁ¬ÐøµÄΨһµÄ£©
RANK() ÀàËÆ£¬²»¹ýRANK ÅÅÐòµÄÊ ......

»Ö¸´oracleÖÐÓÃpl sqlÎóɾ³ýdropµôµÄ±í


²é¿´»ØÊÕÕ¾Öбí
select object_name,original_name,partition_name,type,ts_name,createtime,droptime from recyclebin;
»Ö¸´±í
SQL>flashback table test_drop to before drop;»ò
SQL>flashback table "BIN$b+XkkO1RS5K10uKo9BfmuA==$0" to before drop;
......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ