developer-roadmap/src/data/courses/sql/chapters/defining-tables/lessons/temporal-validation.md

title	description	order	type	initSteps	expectedResults
Temporal Validation	Create a table for event scheduling with temporal constraints	330	challenge	[]	{columns [message]} {values [[Table created successfully}]]

You need to create a table named events for events hosted at the bookstore. The table should track event information using appropriate data types and constraints listed below.

Column	Data Type	Constraints
id	INTEGER	Primary Key
title	VARCHAR(100)	Null values not allowed
start_time	TIMESTAMP	Null values not allowed. Also ensure start_time is always in future.
end_time	TIMESTAMP	Null values not allowed. Also ensure end_time is after start_time
created_at	TIMESTAMP	Not null and default CURRENT_TIMESTAMP

Please note that you are being tested for your ability to work with temporal data. Make sure to add the following CHECK constraints apart from the other constraints mentioned in the table:

• start_time must be in the future
• end_time must be after start_time
• created_at must default to CURRENT_TIMESTAMP

Also, please note that we are using PostgreSQL for our editor, so make sure to use the appropriate statements.

Expected Output

After executing your query, the table should be created successfully with all specified columns and constraints.