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You must have adequate knowledge of databases and a treasure trove of information related to databases, and according to my experience you must have experience in Oracle SYstems and Databases, in addition to follow-up modern versions of databases and find out what distinguishes each issue or feature from the other, in addition to knowing how the system works in programming (its better if you were a developer in the past) to help the programmer to solve the task in the best method of work function.
