Session Ready
Exercise

Invalid violations with overnight parking restrictions

In the previous exercise, you identified parking_violation records with violation_time values that were outside of the restricted parking times. The query for identifying these records was restricted to violations that occurred at locations without overnight restrictions. A modified query can be constructed to capture invalid violation times that include overnight parking restrictions. The parking violations in the dataset satisfying this criteria will be identified in this exercise.

For example, this query will identify that a record with a from_hours_in_effect value of 1000P, a to_hours_in_effect value of 1000A, and a violation_time of 0400P is an invalid record.

Instructions
100 XP
  • Add a condition to the SELECT query that ensures the returned records contain a from_hours_in_effect value that is greater than the to_hours_in_effect value.
  • Add a condition that ensures the violation_time is less than the from_hours_in_effect.
  • Add a condition that ensures the violation_time is greater than the to_hours_in_effect.