Yes, Day of the Dead is celebrated in Chile. Though it is not a  time to necessarily dress up in a skeleton costume and party-it  is a much more somber holiday. Most busin â¦ esses will be closes and  many people will be at the cemeteries. Not in a sad way either, but  in a happy one.
NULL Statement The NULL statement is a no-op (no operation); it passes control to the next statement without doing anything. In the body of an IF-THEN clause, a loop, or a procedure, the NULL statement serves as a placeholder. For more information, see Using the NULL Statement. Syntax
The NVL function allows you to replace null values with a default value. If the value in the first parameter is null, the function returns the value in the second parameter. If the first parameter is any value other than null, it is returned unchanged. We know that COL1 in the test table contains null in all rows except the first.