Learn to create user and manage them in Oracle database. Also learn to create and manage table as a user in Oracle database.

1. ORACLE DBMS: Managing Users & Tables
by
Vazi Okhandiar, PMP, MSCS, MCT
NR Computer Learning Center
1835 W. Orangewood . Suite 200
Orange, CA 92868
www.nrclc.com
Vazi Okhandiar Page 1

2. ORACLE DBMS: Managing Users & Tables
The article consists of perform following 3 tasks using Oracle Relational Database:
 Steps for create an account for a user
 Steps for user to login into Oracle instance and manage data
 Steps for Removing the account from the database instance
STEP 1: Create an account for a user: John
1. Log into oracle instance as SYSDBA
>> sqlplus / as sysdba
2. Create User john with password smith
SQL> CREATE USER john IDENTIIED BY smith;
3. Assign the user (john) to use users as the default tablespace.
SQL> ALTER USER john DEFAULT TABLESPACE users
4. Assign the user (john) to use temp as the temporary tablespace
SQL> ALTER USER john TEMPORARY TABLESPACE temp;
5. Allow user (john) to connect to the database
SQL> GRANT CONNECT TO john;
6. Verify that account is created by listing all the users in the database
SQL> Select * from all_users;
7. Check if the account is locked;
SQL> SELECT account_status FROM dba_users where username=’JOHN’;
If the account is locked then unlock using following command.
SQL> ALTER USER john ACCOUNT UNLOCK;
8. Assign John unlimited quota on tablespace users.
SQL> Alter user john quota unlimited on users;
9. Grant resource to john
SQL> GRANT RESOURCE TO user;
10. Log out of sysdba account
SQL> exit
Vazi Okhandiar Page 2

3. ORACLE DBMS: Managing Users & Tables
STEP 2: Login as john
1. Login as john
>> sqlplus john/smith
2. Create a table called mytable
SQL> create table mytable (
Id number(3),
FirstName varchar2(15),
LastName varchar2(15));
3. Verify the table is created
SQL> select table_name from all_tables order by table_name;
Or
SQL> select table_name from user_tables;
You should see your table in the output list.
4. Insert following records into a table.
SQL> INSERT INTO mytable (ID, FirstName, LastName) Values (1,‘John’, ‘Smith’);
SQL> INSERT INTO mytable (ID, FirstName, LastName) Values (2,‘Jane’, ‘Doe’);
SQL> INSERT INTO mytable (ID, FirstName, LastName) Values (3,‘Paul’, ‘Ryan’);
5. Use SELECT command to verify the data is inserted into the table
SQL> Select * from mytable;
ID FirstName LastName
1 John Smith
2 Jane Doe
3 Paul Ryan
6. Remove jane from the table
SQL > DELETE FROM mytable WHERE id=2;
7. Use SELECT command to verify the jane’s record has been deleted.
SQL> Select * from mytable;
ID FirstName LastName
1 John Smith
3 Paul Ryan
8. Remove the table from the database
Vazi Okhandiar Page 3

4. ORACLE DBMS: Managing Users & Tables
SQL> DROP TABLE mytable;
9. Verify the table is dropped
SQL> select table_name from user_tables;
Note: mytable should not be in the list of tables.
10. Exit out of oracle as john
SQL > exit
STEP 3: Remove the user
1. Log in as sysdba
>> sqlplus / as sysdba
2. Verify john’s account is still in the database
SQL> select * from all_users where username=’JOHN’;
UserName User_ID CREATED
JOHN 91 03-FEB-13
3. Remove the user from the database
SQL> DROP USER john;
If the user’s schema contains objects, then you must use the CASCADE clause to drop the
user and the objects:
SQL> DROP USER john CASCADE;
4. Verify john’s account has been deleted from the database
SQL> select * from all_users where username=’JOHN’;
User dropped.
Reference: Oracle SQL*PLUS Command
http://docs.oracle.com/cd/B13789_01/server.101/b10758/sqlqraa.htm
Vazi Okhandiar Page 4