Manage users & tables in Oracle Database
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The document outlines the process of managing users and tables in Oracle Database, including steps for creating a user account, logging in, managing data, and removing the account. It details commands needed for these tasks such as creating a user, inserting data into a table, and dropping a table or user. The article serves as a practical guide for users to perform basic database management functions.
Manage users & tables 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