Description of the illustration simple_case_expression.eps
CASE case_operand WHEN case_operand_value THEN result_value [ WHEN case_operand_value THEN result_value]... [ ELSE result_value] END
CASE case_operand WHEN case_operand_value THEN result_value [ WHEN case_operand_value THEN result_value]... [ ELSE result_value] END