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Explain the use of decode function
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Answer / Rekha
"The DECODE function in Oracle is used to perform conditional logic within SQL queries, similar to an IF-THEN-ELSE statement. It takes up to six arguments: the first argument is the value to be evaluated, and the remaining arguments are a series of conditions and corresponding return values separated by commas. If the first argument matches one of the conditions, the corresponding return value is returned; otherwise, the function returns null."n
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