oracleȨÏÞÎÊÌ⼯ºÏ
1.oracleÉèÖò»Í¬È¨ÏÞµÄÓû§È¥·ÃÎÊͬһ±í¿Õ¼ä
1.create user testa identified by testa;
2.alter user testa default tablespace users temporary tablespace temp;
3.grant connect to testa;
4.grant select any table to testa;
2.ORACLEÖÐÉèÖÃͬһ¸öÓû§¶ÔÁ½¸ö±í¿Õ¼äµÄȨÏ޵ĴúÂë
alter user Óû§ quota unlimited on ±í¿Õ¼äA;
alter user Óû§ quota unlimited on ±í¿Õ¼äB;
»òÕß·Å¿ªËùÓбí¿Õ¼ä
grant unlimited tablespace to Óû§;
»òÕßË÷ÐÔ¸øËùÓÐȨÏÞ
grant resource,connect,dba to Óû§;
3.ORACLEÉèÖÃÖ»ÄÜ·ÃÎʱíȨÏÞµÄÓû§
grant select on table1 to user1;
grant select on table2 to user1;
Ïà¹ØÎĵµ£º
oracle±í¿Õ¼ä²Ù×÷Ïê½â
1
2
3×÷Õߣº À´Ô´£º ¸üÐÂÈÕÆÚ£º2006-01-04
5
6
7½¨Á¢±í¿Õ¼ä
8
9CREATE TABLESPACE data01
10DATAFILE '/ora ......
Oracle Enterprise Manager Oracle EMÊÇÓû§°²×°Oracle£¬´´½¨ÁËÊý¾Ý¿â²¢ÅäÖúÃÍøÂç×ÊÔ´ºó£¬Oracle¸½´ø°²×°µÄÒ»¸öÊý¾Ý¿â¹ÜÀíÈí¼þ¡£Í¬Ê±£¬EMÒ²Ìṩ¶ÔÐÔÄܵ÷ÊÔÓаïÖúµÄ¹¤¾ß£¬ÈçSQL*LoaderºÍRecovery Manager £¨RMAN£©µÈ¡£ Oracle Diagnostics Pack (ODP) ODPÓ¦¸ÃËãÊÇOracleÊý¾Ý¿â»·¾³ÐÔÄܵ÷ÊÔµÄ×îÖ÷ÒªºÍ×îÓÐЧµÄ¹¤¾ß£¬ËüÌá¹ ......
±¾ÎĽÚÑ¡×Ô¡¶Oracle DBAÊּǗ—Êý¾Ý¿âÕï¶Ï°¸ÀýÓëÐÔÄÜÓÅ»¯Êµ¼ù¡·µÚ1Õ“EygleµÄDBA¹¤×÷Êּǔ£¨×÷Õߣº¸Ç¹úÇ¿£©
DBAÈÕ³£¹¤×÷Ö°Ôð——ÎÒ¶ÔDBAµÄ7µã½¨Òé
DBAµÄ¹¤×÷Ö°ÔðÊÇʲô£¿Ã¿ÌìDBAÓ¦¸Ã×öÄÄЩ¹¤×÷£¿Îȶ¨»·¾³ÖеÄDBA¸ÃÈçºÎ³É³¤ÓëÓÅ»¯£¿ÕâÊǺܶàÈ˶¼Ôø¾Ìá³ö¹ýµÄÎÊÌ⣬ÏÂÃæÊÇÎҵĹ۵ãºÍ½¨Òé£ ......
ƽʱÓõıȽ϶àµÄ£¬¾ÍÊÇNVL£¬Ã»ÔõôÔÚÒâÆäËû¼¸¸ö¡£
NVL ¾Í²»ÓÃ˵ÁË£¬¾ÍÊÇÅжϵÚÒ»¸öÊÇ·ñΪNULL£¬ÊǾÍÓõڶþ¸ö´úÌæ£¬²»ÊǾͷµ»ØµÚÒ»¸ö¡£
NVL2 Ò²ÊÇÅжϵÚÒ»¸öÊÇ·ñΪNULL£¬µ«ÊÇ·µ»ØÖµÈ´²»Í¬¡£µÚÒ»¸öΪNULL£¬¾Í·µ»ØµÚÈý¸ö£¬·ñÔò·µ»ØµÚ¶þ¸ö¡£
NULLIF ÅжÏÁ½¸ö²ÎÊýÊÇ·ñÏàµÈ£¬ÏàµÈ·µ»ØNULL£¬·ñÔò·µ»ØµÚÒ»¸ö²ÎÊý¡£
COALESCE Õâ ......