CREATE USER
create_user_stmt:
| Code Block |
|---|
create_user_stmt ::= 'CREATE USER' user_name 'IDENTIFIED BY' password |
사용자를 생성하는 구문은 다음과 같다.
| Code Block |
|---|
--예제 CREATE USER new_user IDENTIFIED BY password |
목차
| Table of Contents | ||||||||
|---|---|---|---|---|---|---|---|---|
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DROP USER
drop_user_stmt:
| Code Block |
|---|
drop_user_stmt ::= 'DROP USER' user_name |
사용자를 삭제하는 구문은 다음과 같다. SYS 사용자는 삭제할 수 없으며, 삭제 대상 사용자가 이미 생성한 테이블이 있을 경우에는 에러를 나타낸다.
| Code Block |
|---|
--예제 DROP USER old_user |
ALTER USER
alter_user_pwd_stmt:
| Code Block |
|---|
alter_user_pwd_stmt ::= 'ALTER USER' user_name 'IDENTIFIED BY' password |
사용자는 아래의 구문을 통해 비밀번호를 변경할 수 있다.
| Code Block |
|---|
--예제 ALTER USER user1 IDENTIFIED BY password |
CONNECT
user_connect_stmt:
| Code Block |
|---|
user_connect_stmt: 'CONNECT' user_name '/' password |
사용자는 응용 프로그램을 종료하지 않고, 다음의 구문을 통해 다른 사용자로 재접속할 수 있다.
| Code Block |
|---|
--예제 CONNECT user1/password; |
사용자 관리 예제
위의 쿼리를 수행한 예제와 그 결과를 나타냈다.
| Code Block | ||
|---|---|---|
| ||
############################################ # Connect SYS : SYS 계정으로 접속함. ############################################ Mach> create user demo identified by 'demo'; Created successfully. Mach> drop user demo; Dropped successfully. Mach> create user demo1 identified by 'demo1'; Created successfully. Mach> create user demo2 identified by 'demo2'; Created successfully. Mach> alter user demo2 identified by 'demo22'; Altered successfully. Mach> create table demo1_table (id integer); Created successfully. Mach> create bitmap index demo1_table_index1 on demo1_table(id); Created successfully. Mach> insert into demo1_table values(99991); 1 row(s) inserted. Mach> insert into demo1_table values(99992); 1 row(s) inserted. Mach> insert into demo1_table values(99993); 1 row(s) inserted. Mach> select * from demo1_table; ID -------------- 99993 99992 99991 [3] row(s) selected. #Error: 자기 자신을 Drop 할 수 없음. Mach> drop user SYS; [ERR-02083 : Drop user error. You cannot drop yourself(SYS).] ############################################ # Connect DEMO1 ############################################ Mach> connect demo1/demo1; Connected successfully. #Error: 일반 유저는 다른 사용자의 비밀번호를 바꿀 수 없다. Mach> alter user demo2 identified by 'demo22'; [ERR-02085 : ALTER user error. The user(DEMO2) does not have ALTER privileges.] Mach> alter user demo1 identified by demo11; Altered successfully. Mach> connect demo2/demo22; Connected successfully. #Error: wrong password Mach> connect demo1/demo11234; [ERR-02081 : User authentication error. Invalid password (DEMO11234).] # Correct password Mach> connect demo1/demo11; Connected successfully. Mach> create table demo1_table (id integer); Created successfully. Mach> create bitmap index demo1_table_index1 on demo1_table(id); Created successfully. Mach> insert into demo1_table values(1); 1 row(s) inserted. Mach> insert into demo1_table values(2); 1 row(s) inserted. Mach> insert into demo1_table values(3); 1 row(s) inserted. Mach> select * from demo1_table; ID -------------- 3 2 1 [3] row(s) selected. Mach> select * from demo1.demo1_table; ID -------------- 3 2 1 [3] row(s) selected. ############################################ # Connect SYS again ############################################ Mach> connect SYS/MANAGER; Connected successfully. Mach> select * from demo1_table; ID -------------- 99993 99992 99991 [3] row(s) selected. Mach> select * from demo1.demo1_table; ID -------------- 3 2 1 [3] row(s) selected. #Error: demo1 유저에 속한 테이블이 존재함. Mach> drop user demo1; [ERR-02084 : DROP user error. The user's tables still exist. Drop those tables first.] Mach> connect demo1/demo11; Connected successfully. Mach> drop table demo1_table; Dropped successfully. Mach> connect SYS/MANAGER; Connected successfully. Mach> drop user demo1; Dropped successfully. |