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×ÊÁÏ»ñÈ¡×ÔѧϰºÎÃ÷Öø×÷<<Oracle DBA Åàѵ½Ì³Ì>>µÚ¶þ°æÖ®Ê±.ÆäÖÐdba_¿ªÍ·µÄ±íÐèÒªÓÐsysdbaȨÏÞ²ÅÄÜ·ÃÎÊ.
1. »ñÈ¡Êý¾Ý¿âÃû×Ö,´´½¨ÈÕÆÚ,µ±Ç°Ä£Ê½,ÈÕ־ģʽµÈµÈ:
SELECT name,created,log_mode,open_mode from v$database;
2. »ñÈ¡ÔËÐÐʵÀýµÄÖ÷»úÃû,ʵÀýÃû,°æ±¾:
SELECT host_name,instance_name,version from v$instance;
3. »ñÈ¡×é¼þ°æ±¾ÐÅÏ¢.
SELECT * from v$version;
4.»ñÈ¡¿ØÖÆÎļþÐÅÏ¢.
SELECT * from v$controlfile;
5.»ñÈ¡ÈÕÖ¾ÎļþÐÅÏ¢.
SELECT * from v$logfile;
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SELECT group#, members, bytes, status, archived from v$log;
6. »ñÈ¡±¸·ÝºÍ»Ö¸´²ßÂÔ,ÒÔ¼°¹éµµÎļþλÖÃ.(Ò²ÐèÒªsysdbaȨÏÞ)
archived log list
7. Èç¹ûÉÏÃæÊä³öÖеĴ浵ÖÕµãµÄÖµ²»ÊÇÖ±½ÓµÄĿ¼¶øÊÇ USE_DB_RECOVERY_FILE_DEST µÄ»°,ÓÃÒÔÏÂÓï¾ä»ñÈ¡×îÖÕÐÅÏ¢.
SELECT name,value from v$parameter WHERE name = 'db_recovery_file_dest';
8.»ñÈ¡±í¿Õ¼äÐÅÏ¢.
SELECT tablespace_name, block_size, status, contents, logging from dba_tablespaces;
9. »ñÈ¡Êý¾ÝÎļþÐÅÏ¢.
SELECT file_id, file_name, tablespace_name, status, bytes from dba_data_files;
10. ÔÚûÓÐsysdbaȨÏÞʱ,¿ÉÒÔÓÃÒÔÏÂÓï¾äÀ´»ñÈ¡Êý¾ÝÎļþµÄ´¢´æÎ»ÖÃÐÅÏ¢.
SELECT name from v$datafile;
11. »ñÈ¡Óû§ÐÅÏ¢.
SELECT username,created from dba_users;


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oracle ±Ê¼Ç VIII Ö®ÊÂÎñºÍË÷Òý

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Ë÷Òý¾ÍÒ»ÖÖÌØÊâµÄ²éѯ±í£¬Êý¾Ý¿âµÄËÑË÷ÒýÇæ¿ ......

oracle ±Ê¼Ç IX Ö®ÄÚÁª¡¢×óÁª¡¢ÓÒÁª

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Table A
aid adate
1 a1
2 a2
3 a3
TableB
bid bdate
1 b1
2 b2
4 b4
Á½¸ö±ía,bÏàÁ¬½Ó,Ҫȡ³öidÏàͬµÄ×Ö¶Î
select * from a inner join b on a.aid = b.bidÕâÊǽöÈ¡³öÆ¥ÅäµÄÊý¾Ý.
´ËʱµÄÈ¡³öµÄÊÇ:
1 a1 b1
2 a2 b2
ÄÇôleft join Ö¸:
select * ......

oracle ÊÓÆµ±Ê¼Ç1(select)

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Èç¹û²»ÖªµÀµ±Ç°Óû§ÊÇʲôÓû§,¿ÉÒÔÊäÈë: show user ,ÕâÑùËü¾ÍÏÔʾ³öµ±Ç°Óû§ÊÇʲôÓû§ÁË.
Èç¹ûÏë±à¼­ÒѾ­ÊäÈëµ½sqlplusÖеĴúÂë,¿ÉÒÔÊäÈë“ed”£¬È»ºó»Ø³µ¾ÍÄܵ¯³öÒ»¸ö¼Çʱ¾£¬¼Çʱ¾ÀïÃæÓÐÉÏÒ»²½ÊäÈëµÄ´úÂë,Ð޸ĴúÂë²¢±£´æºó¹Ø±Õ¼Çʱ¾,×îºóÔÚsqlplusÖÐÊäÈë“/”²¢»÷»Ø ......

oracle ÊÓÆµ±Ê¼Ç3(insert¡¢update¡¢delete)

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1.ΪÁ˲»´òÂÒÔ­À´µÄ±íµÄÊý¾Ý,ËùÒÔ±¸·ÝÔ­À´µÄÊý¾Ý.
create table emp2 as select * from emp
create table emp3 as select * from emp
create table dept2 as select * from dept
create table salgrade2 as select * from salgrade
2.²é¿´±íµÄÉè¼ÆÇé¿ö:desc dept2;±íʾ²é¿´±ídept2µÄÉè¼ÆÇé¿ö.
3.²åÈëÊý¾Ýµ ......

oracle º¯ÊýÕûÀí(Ò»)

1. ASCII: ·µ»ØÓëÖ¸¶¨µÄ×Ö·û¶ÔÓ¦µÄÊ®½øÖÆÊý;
SQL> select ascii('A') A,ascii('a') a,ascii(0) zero,ascii('') space from dual; 
   A A ZERO SPACE
   --------- --------- --------- ---------
   65 97 48 
2. CHR:¸ø³öÕûÊý,·µ»Ø¶ÔÓ¦µÄ×Ö·û;
SQ ......
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