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

SQLÓï¾äPART5

Confirming granted privileges
Data Dictionary View                Description
ROLE_SYS_PRIVS                System privileges granted to roles
ROLE_TAB_PRIVS                Table privileges granted to roles
USER_ROLE_PRIVS             Roles accessible by the user
USER_SYS_PRIVS               System privileges granted to the user
USER_TAB_PRIVS_MADE     Object privileges granted on the user's objects
USER_TAB_PRIVS_RECD     Object privileges granted to the user
USER_ROLE_PRIVS_MADE  Object privileges granted on the columns of the user's objects
USER_ROLE_PRIVS_RECD:  Object privileges granted to the user on specific columns
Revoking Object Privileges
grammer:
revoke {privileges [, privileges...] | all}
on object from {user [,...user...] | role | pubic} cascade constraints;
// privileges granted to others through the WITH GRANT OPTION clause are also revoked.
 Alter table statement
grammer:
alter table table1 add (column datatype [default expr] [, column datatype]...);
alter table table1 modify (column datatype [default expr] [, column datatype]...);
alter table table1 drop (column);
Alter table (set unused option)
grammer:
alter table <table_name> set unsed (<column_name>);
or
alter table <table_name> set unsed column <column_name>;
then:
alter table <table_name> drop unused columns;
Constraint: Adding a constraint Syntax
grammer:
alter table <table_name> add [constraint <constraint_name>] type (<column_name>);
e.g.:
alter table emp2 modify employee_id primary key;
alter table emp2 add constraint emp_mgr_fk foreign key(manager_id) references emp2(employee_id);


Ïà¹ØÎĵµ£º

PL/SQL³ÌÐòÉè¼Æ£¨ÓαêµÄʹÓã©


 ÎªÁË´¦Àí SQL Óï¾ä£¬ORACLE ±ØÐë·ÖÅäһƬ½ÐÉÏÏÂÎÄ( context area )µÄÇøÓòÀ´´¦ÀíËù±ØÐèµÄÐÅÏ¢£¬ÆäÖаüÀ¨Òª´¦ÀíµÄÐеÄÊýÄ¿£¬Ò»¸öÖ¸ÏòÓï¾ä±»·ÖÎöÒÔºóµÄ±íʾÐÎʽµÄÖ¸ÕëÒÔ¼°²éѯµÄ»î¶¯¼¯(active set)¡£
 ÓαêÊÇÒ»¸öÖ¸ÏòÉÏÏÂÎĵľä±ú( handle)»òÖ¸Õ롣ͨ¹ýÓα꣬PL/SQL¿ÉÒÔ¿ØÖÆÉÏÏÂÎÄÇøºÍ´¦ÀíÓï¾äʱÉÏÏÂÎÄÇø»á·¢ÉúÐ ......

¹ØÓÚSQLSERVERÖиüÐÂTextÀàÐÍSQLÓï¾ä½âÎö

 »ù±¾·½·¨:
                   
UPDATETEXT { table_name.dest_column_name dest_text_ptr }//{ Òª¸üеıíÒÔ¼° text¡¢ntext »ò image ÁеÄÃû³Æ,Ö¸ÏòÒª¸üÐ嵀 text¡¢ntext »ò image Êý¾ÝµÄÎı¾Ö¸ÕëµÄÖµ£¨ÓÉ TEXT ......

06—PL/SQL±à³Ì

PL/SQL: OracleÖеÄSQL¹ý³Ì»¯±à³ÌÓïÑÔ
1. PL/SQL³ÌÐòÊÇÓÉ¿é½á¹¹¹¹³É£¬¸ñʽÈçÏ£º
  [DECLARE
   --ÉùÃ÷²¿·Ö
¡¡]
  BEGIN
   -- Ö÷Ìå
   [EXCEPTION
     -- Òì³£´¦Àí¿é
   ]
  END;
  /  --¿éµÄ½áÊø
2.±äÁ¿
¼òµ¥±äÁ¿£º ......

ORACLE PL/SQL°ü(package)ѧϰ±Ê¼Ç

°üÓɰü¹æ·¶ºÍ°üÌåÁ½²¿·Ö×é³É¡£
 
1¡¢°ü¹æ·¶£¨Package Specification£©
°ü¹æ·¶£¬Ò²½Ð×ö°üÍ·£¬°üº¬ÁËÓйذüµÄÄÚÈݵÄÐÅÏ¢¡£µ«ÊÇ£¬Ëü²»°üº¬Èκιý³ÌµÄ´úÂë¡£
´´½¨°üÍ·µÄÓï·¨Ò»°ãÈçÏÂ
 
CREATE [OR REPLACE] PACKAGE package_name {IS | AS}
Procedure_name | function_name | variable_declaration | type_def ......

SQLÓï¾äPART4

GRANT
Name
GRANT -- ¶¨Òå·ÃÎÊȨÏÞ
Synopsis GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER }
    [,...] | ALL [ PRIVILEGES ] }
    ON [ TABLE ] tablename [, ...]
    TO { username | GROUP groupname | PUBLIC } [, ...] [ WI ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ