The Driver Relationship team wants to ensure that the all driving license IDs in the active drivers table have the length of 7. Alter the ACTIVE_DRIVERS table created in Chapter 8, Activity 1 to check the length of the DRIVER_DRIVING_LICENSE_ID. Add a CHECK to the ACTIVE_DRIVERS table to enforce a driver license length of 7. Test Query: SELECT DISTINCT(constraint_name) FROM information_schema.check_constraints WHERE constraint_schema = 'InstantRide' AND constraint_name = 'ACTIVE_DRIVERS_chk_1' Expected Results CONSTRAINT_NAME ACTIVE_DRIVERS_chk_1
The Driver Relationship team wants to ensure that the all driving license IDs in the active drivers table have the length of 7. Alter the ACTIVE_DRIVERS table created in Chapter 8, Activity 1 to check the length of the DRIVER_DRIVING_LICENSE_ID. Add a CHECK to the ACTIVE_DRIVERS table to enforce a driver license length of 7. Test Query: SELECT DISTINCT(constraint_name) FROM information_schema.check_constraints WHERE constraint_schema = 'InstantRide' AND constraint_name = 'ACTIVE_DRIVERS_chk_1' Expected Results CONSTRAINT_NAME ACTIVE_DRIVERS_chk_1
Chapter4: Constraints
Section: Chapter Questions
Problem 6RQ: How is adding a NOT NULL constraint to an existing table different from adding other types of...
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Task 2:
The Driver Relationship team wants to ensure that the all driving license IDs in the active drivers table have the length of 7. Alter the ACTIVE_DRIVERS table created in Chapter 8, Activity 1 to check the length of the DRIVER_DRIVING_LICENSE_ID.
Add a CHECK to the ACTIVE_DRIVERS table to enforce a driver license length of 7.
Test Query:
SELECT DISTINCT(constraint_name)
FROM information_schema.check_constraints
WHERE constraint_schema = 'InstantRide'
AND constraint_name = 'ACTIVE_DRIVERS_chk_1'
Expected Results
CONSTRAINT_NAME |
---|
ACTIVE_DRIVERS_chk_1 |
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