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4. Using a set operator, display the creditor number of all creditors who have ever been paid.
How to initialize variables with default values?
12. Display the client name in upper case only and in lower case only.
Explain what does a control file contain?
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Can we insert data in view oracle?
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Explain the use of file option in exp command.
Explain integrity constraint?
how to find the second highest salary in a given table????