Why are recursive relationships bad? How do you resolve them?
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Give one method for transferring a table from one schema to another?
How many dba can you have?
Does dba need to know programming?
Discuss row chaining, how does it happen?
How can you find all the processes on your system?
Is it necessary to have database in archive log mode in configuration dataguard , if yes then why?
What skills should a dba have?
What is explain plan and how is it used?
What parameters control copy latches?
Show one instance when you encountered an error in alert log and you overcome that error. What actions you took to overcome that error.
A dba had to remove some archivelogs to free up space in filesystem. Nowwhen the rman job starts to backup archivelogs, it complains about missing archivelogs thatwere deleted by dba. To resolve the issue and continue backing up remainder of archivelogs,which rman command can be used so it wo not complain about missing archivelogs.
What do you mean by dba?
Oracle General 
