Exercise

Type conversion with a CASE clause

One of the parking_violation attributes included for each record is the vehicle's location with respect to the street address of the violation. An 'F' value in the violation_in_front_of_or_opposite column indicates the vehicle was in front of the recorded address. A 'O' value indicates the vehicle was on the opposite side of the street. The column uses the TEXT type to represent the column values. The same information could be captured using a BOOLEAN (true/false) value which uses less memory.

In this exercise, you will convert violation_in_front_of_or_opposite to a BOOLEAN column named is_violation_in_front using a CASE clause. This column is true for records that occur in front of the recorded address and false for records that occur opposite of the recorded address.

Instructions

100 XP
  • Include one case condition that sets the value of is_violation_in_front to true when the violation_in_front_of_or_opposite value is equal to 'F' for the record.
  • Include another case condition that sets the value of is_violation_in_front to false when the violation_in_front_of_or_opposite value is equal to 'O' for the record.