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The IFNULL( ) function is available in MySQL, and not in SQL Server or Oracle. This function takes two arguments.
If the first argument is not NULL, the function returns the first argument. Otherwise, the second argument is returned.
Exception handling in SQL
Whenever an exception occurs our code gets disrupted. Exception handling is a way to handle these disruptions, Like we may log when an exception occurs or we may raise error when any exception occurs. We can use TRY a
