7/21/2019 Day 4 - Connect to Database

http://slidepdf.com/reader/full/day-4-connect-to-database 1/1

How to check the no of databases on the server:  - /etc/oratab

How to check no of databases currently running on the server:  - ps -ef | grep pmon/smon How to check the database status from sqlplus:  - select instance_name, status from v$instance;  - select name, open_mode from v$database; How to shutdown your database:  - shutdown immediate;  - shut immediate; How to startup your database:  - startup 

BASE TABLES:=============

EMP (empno, ename, sal, manager)DEPT (deptno, deptname, location)JOB (jobid, jobname, location)

Metadata - Data about data

dba_tables - tables in the databasedba_users - users in the databasedba_objects - objects in the databse

Base tables = data dictionary tables