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    EXTENT    MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO 
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µÚÒ»: CREATE TABLESPACE "SAMPLE" ¡¡´´½¨Ò»¸öÃûΪ "SAMPLE" µÄ±í¿Õ¼ä.    ¶Ô±í¿Õ¼äµÄÃüÃû,×ñÊØOracle µÄÃüÃû¹æ·¶¾Í¿ÉÁË.   ORACLE¿ÉÒÔ´´½¨µÄ±í¿Õ¼äÓÐÈýÖÖÀàÐÍ:(1)TEMPORARY: ÁÙʱ±í¿Õ¼ä,ÓÃÓÚÁÙʱÊý¾ÝµÄ´æ·Å;´´½¨ÁÙʱ±í¿Õ¼äµÄÓï·¨ÈçÏÂ:CREATE TEMPORARY TABLESPACE "SAMPLE"......   (2)UNDO : »¹Ô­±í¿Õ¼ä. ÓÃÓÚ´æÈëÖØ×öÈÕÖ¾Îļþ. ´´½¨»¹Ô­±í¿Õ¼äµÄÓï·¨ÈçÏÂ:CREATE UNDO TABLESPACE "SAMPLE"......(3)Óû§±í¿Õ¼ä: ×îÖØÒª,Ò²ÊÇÓÃÓÚ´æ·ÅÓû§Êý¾Ý±í¿Õ¼ä    ¿ÉÒÔÖ±½Óд³É: CREATE TABLESPACE "SAMPLE"TEMPORARY ºÍ UNDO ±í¿Õ¼äÊÇORACLE ¹ÜÀíµÄÌØÊâµÄ±í¿Õ¼ä.Ö»ÓÃÓÚ´æ·ÅϵͳÏà¹ØÊý¾Ý.µÚ¶þ:   LOGGING
ÓÐ NOLOGGING ºÍ LOGGING Á½¸öÑ¡Ïî,      NOLOGGING: ´´½¨±í¿Õ¼äʱ,²»´´½¨ÖØ×öÈÕÖ¾.     LOGGING ºÍNOLOGGINGÕýºÃÏà·´, ¾ÍÊÇÔÚ´´½¨±í¿Õ¼äʱÉú³ÉÖØ×öÈÕÖ¾.ÓÃNOLOGGINGʱ,ºÃ´¦ÔÚÓÚ´´½¨Ê±²»ÓÃÉú³ÉÈÕÖ¾,ÕâÑù±í¿Õ¼äµÄ´´½¨½Ï¿ì,µ«ÊÇûÄÜÈÕÖ¾,Êý¾Ý¶ªÊ§ºó,²»Äָܻ´,µ«ÊÇÒ»°ãÎÒÃÇÔÚ´´½¨±í¿Õ¼äʱ,ÊÇûÓÐÊý¾ÝµÄ,°´Í¨³£µÄ×ö·¨,Êǽ¨Íê±í¿Õ¼ä,²¢µ¼ÈëÊý¾Ýºó,ÊÇÒª¶ÔÊý¾Ý×ö±¸·ÝµÄ,ËùÒÔͨ³£²»ÐèÒª±í¿Õ¼äµÄ´´½¨ÈÕÖ¾,Òò´Ë,ÔÚ´´½¨±í¿Õ¼äʱ,Ñ¡Ôñ NOLOGGING,ÒÔ¼Ó¿ì±í¿Õ¼äµÄ´´½¨ËÙ¶È.
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create or replace trigger del_dept_id
after delete on dept
for each row
begin
delete from emp where deptno=:old.deptno;
end;
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