Why do we use coalesce function in oracle?
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Table E: Name dept month sal 1 A JAN 800 2 B APR 1000 3 A JAN 300 4 A JAN 600 5 C JUN 400 1) SELECT HIGHEST SAL PAID DEPT IN JAN MONTH? 2) WRITE QUERY GET MAX SAL DEPT NO?
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4. Display the order number and client number from the ORDER table. Output the result in the format. Client <clientno> ordered <orderno>