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);
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id name
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1 test1
2 test2
3 test3
4 test4
5 test5
6 test6
2 test2
3 test3
2 test2
6 test6
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id varchar (20),
name varchar (20)
)
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CREATE [OR REPLACE] TYPE [schema.] type_name
[AUTHID {CURRENT_USER|DEFINER}] AS OBJECT (
Attribute1 datatype,
[attribute2 datatype,…]
[method 1]
[method 2]);
/
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EXEC sp_tableoption '±íÃû','pintable', 'false'
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WHERE TABLE_TYPE = 'BASE TABLE'
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