What does it take to be a good DBA.

Hi i am a student with 1 year to go and i interested in becoming a DBA i have no real world experience but i have done java ,php,prolog and i have good knowlege of sql queries. I do understand that you need to be good a drivers1,2,3 and 4

Not really. What you need to know and do to be a good DBA is basically be a control freak and totally paranoid about loosing anything... also have an intimate knowlege about backup and recovery and database design. DBA's are paid to ensure the data is there 24X7 365 days a year... yes, every day all day.
If you loose it, don't bother coming back to work.
When the world crashes--and it will--your worth is measured directly by the speed you can recover it all... Yes, all of it, even that stuff that just was updated... oh, the moment the system decided it needed to go south for the winter.
Depending on the shop you are in, you may have other duties--database design, sql queries, programming--helping the developers.
First and foremost you will be the person in charge of making the data secure and accessible to those that need to see it.
Depending on your environment--you may never be allowed to touch Java, php, or prolog. It maybe that you have to subsist on programming in the SQL scripting language or a shop standard.

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