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

oracle ±í½á¹¹µÄÐÞ¸Ä

¸ü¸Ä±íµÄ½á¹¹
1.±à¼­±íµÄ×Ö¶Î
  ÐÞ¸ÄÒ»¸öÁеÄÊý¾ÝÀàÐÍ(Ò»°ãÏÞÓÚÐ޸ij¤¶È£¬ÐÞ¸ÄΪһ¸ö²»Í¬ÀàÐÍʱÓÐÖî¶àÏÞÖÆ):
  Óï·¨:
    ALTER TABLE ±íÃû MODIFY(ÁÐÃû Êý¾ÝÀàÐÍ);
 eg1:
   alter table skate_test modify (author number(10,0) )
   ÔÚÐÞ¸ÄÁеij¤¶Èʱºò,Ö»Äܱ༭±ÈÏÖÓÐ×Ö¶Îʵ¼Ê´æµÄ³¤¶È»¹Òª´ó,·ñÔòÌáʾÏÂÃæµÄ´íÎó:
     ORA-01441: ÎÞ·¨¼õСÁ㤶È, ÒòΪһЩֵ¹ý´ó
 eg2:
  
    alter table skate_test modify (author varchar2(10) )
   ÔÚÐÞ¸ÄÁеÄÊý¾ÝÀàÐ͵Äʱºò,ËùÐ޸ĵÄÁбØÐëΪ¿Õ,·ñÔòÌáʾÏÂÃæµÄ´íÎó:
     ORA-01439: Òª¸ü¸ÄÊý¾ÝÀàÐÍ, ÔòÒªÐ޸ĵÄÁбØÐëΪ¿Õ
2.Ôö¼ÓÒ»¸öÁÐ
  Óï·¨:
      ALTER TABLE ±íÃû ADD(ÁÐÃû Êý¾ÝÀàÐÍ);
   eg1£º
  
      ALTER TABLE skate_test ADD(author NUMBER(38,0) not null);
3.¸øÁиÄÃû£º
  Óï·¨:
     ALTER TABLE ±íÃû RENAME COLUMN µ±Ç°ÁÐÃû TO ÐÂÁÐÃû;
  eg1£º
   
     ALTER TABLE skate_test RENAME COLUMN author TO authorer_new
4.ɾ³ýÒ»¸öÁÐ
   Óï·¨:
    ALTER TABLE ±íÃû DROP COLUMN ÁÐÃû;
 
  eg1£º
 
    alter table skate_test drop column author
5.½«Ò»¸ö±í¸ÄÃû
  Óï·¨:
   ALTER TABLE µ±Ç°±íÃû RENAME TO бíÃû;
 
  eg1£º
  
   alter table skate_test rename to test_sakte
5.¸ø±í¼Ó×¢ÊÍ
 comment column on ±íÃû.ÁÐÃû is '×¢ÊÍÄÚÈÝ';   //Ð޸ıíµÄÁеÄ×¢ÊÍ
 
 COMMENT ON TABLE MOVO_NEW.TEST_SAKTE  IS '×¢ÊÍÄÚÈÝ';  //Ð޸ıíµÄ×¢ÊÍ
--- ´ýÐø---


Ïà¹ØÎĵµ£º

OracleÊý¾Ý×ÖµäµÄµ¼³ö

-- ²éѯij±íµÄÊý¾Ý×Öµä
 SELECT  A.TABLE_NAME AS "±íÃû",A.COLUMN_NAME AS "×Ö¶ÎÃû",
 DECODE(A.CHAR_LENGTH,0,DECODE(A.DATA_SCALE,NULL,A.DATA_TYPE,A.DATA_TYPE||'('||A.DATA_PRECISION||','||A.DATA_SCALE||')'),
 A.DATA_TYPE||'('||A.CHAR_LENGTH||')') as "×Ö¶ÎÀàÐÍ1",A.DATA_TYPE AS "×Ö¶Î ......

³¹µ×Ð¶ÔØORACLE(WINXP)

ÓÃoracleµÄÐ¶ÔØ³ÌÐò²¢²»ÄÜÍêÈ«Ð¶ÔØ¸É¾»¡£Èç֮ǰµÄÃüÃûµÄoracle sid ²»ÄÜÔÙʹÓ᣻áÌáʾsid´æÔÚ¡£ÏÂÃæÊÇÔÚwinxpÏÂÍêÈ«Ð¶ÔØoracleµÄ·½·¨¡£
1¡¢¿ªÊ¼£­£¾ÉèÖã­£¾¿ØÖÆÃæ°å£­£¾¹ÜÀí¹¤¾ß£­£¾·þÎñ  
     Í£Ö¹ËùÓÐOracle·þÎñ¡£  
2¡¢¿ªÊ¼£­£¾³ÌÐò£­£¾Oracle  -  OraHome81£­£¾Oracle   ......

oracle½¨¶à¸ödblink

ÓÃtg4mssqlÁ´½Óoracle.
¹ý³Ì²»ÔÚÃèÊö£¬googleºÜ¶à¡£
ÎÊÌ⣺
1¡¢mssql expressµÄʱºò£¬Ê§°Ü
½«serverÓÃתÒå×Ö·ûд³ö£¬³É¹¦¡£
HS_FDS_CONNECT_INFO="SERVER=SHAM0415\\SQLEXPRESS;DATABASE=GMT_KJ"
2¡¢½¨¶à¸öµÄʱºò£¬²»ÄܽâÎö¡£ tnsping ÃüÁî×ܲ»Í¨¹ý¡£
ÕÒÁ˺ܶ࣬ͬһ¸öÌû×Ó£¬×ªÁËÎÞÊý´Î¡£¡£
°¦¡£¡£ÖйúµÄ ......

OracleÊÕ¹ºSun£¬ÒâÔÚIBM£¬Ãëɱ΢Èí

¡¡¡¡Sun±¾À´¾ÍºÜÀ÷º¦£¬Î޷ǽüÄêÀ´Ó¯ÀûÄÜÁ¦ÓÐËùϽµ£¬Oracle¿¿Êý¾Ý¿â׬ÁË´ó°Ñ³®Æ±¡£Á½¼ÒÁªºÏÒÔºóÐγɓCPU-¸ß¶ËÖ÷»ú-²Ù×÷ϵͳ-¿ª·¢»·¾³-Êý¾Ý¿â-ÓïÑÔ-Ó¦ÓÃÈí¼þ”Ò»ÌõÁú²úÆ·Ïߣ¬´ËǰÓдËÄÜÁ¦µÄÖ»ÓÐIBM¡£
¡¡¡¡Á½¼Ò½ñºóµÄÕÐÅÆ²úÆ·¶Ô±ÈÈçÏ£º
SUN&Oracle IBM
CPU Ultra Power
Ö÷»ú UltraϵÁÐ RS,ASµÈPowerϵÁ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ