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Firstly i will say about the team As a dba if this your first job mostly you will work in L2 team and here you will many things but you will not get time to learn new things so after completing two years need to switch to l3 team or outside. I have worked for good clients within l2 team. 1. User management 2. Tablespace management 3. Stop and start db including rac database also 4. Logical thing bkp Schema refresh expdp /impdp and table schema and full db backup by this. 5. Patching on non rac db with standby 6 Solved Performance issues faced by application team( query optimization, stats gathering index rebuilding long running queries Awr and ash report, run sql tuning advisory At last also raised sr with oracle support they have suggested to change or increase the value of db parameters like sga and pga etc 7 Guaranteed Restore point creation testing work for apps team and rollback by using this. 8 solve sync issues as rfs not working due to various reasons like fra full, standby file management manual , password file change standby down. 9 restoration of db with rman and active duplicate method 10 upgrade the db with traditional way 11 rman bkp configuration and schedule with crontab using rman catalog db 12 Job security is good. If you get dba job please do if you are not interested in coding or development areas. Because here no coding required. For oracle dba kindly learn medium level In sql knowledge of ddl dml tcl dcl dql and object level knowledge because it will help while taking schema bkp. Basic linux commands. df - h ( filesyetem) ps - ef | grep pmon ( show db which are running) Kill - 9 id or kill -9 child id parent id rm -rf ( delete) mv ( move or rename) top to check the top process which are running free -gt to check the memory tnsping dbname After environment set use below command sqlplus / as sysdba -- this is the command to connect with database with sys user through password file because sys password store in this file that is why we use / For remote check Sqlplus username/password@servicename
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