나는 이렇게 학습한다/Algorithm & SQL 405

Register for the Party (SQL for Beginners #3)

You received an invitation to an amazing party. Now you need to write an insert statement to add yourself to the table of participants. participants table schema name (string) age (integer) attending (boolean) NOTES: Since alcohol will be served, you can only attend if you are 21 or older You can't attend if the attending column returns anything but true NOTE: Your solution should use pure SQL. ..

On the Canadian Border (SQL for Beginners #2)

You are a border guard sitting on the Canadian border. You were given a list of travelers who have arrived at your gate today. You know that American, Mexican, and Canadian citizens don't need visas, so they can just continue their trips. You don't need to check their passports for visas! You only need to check the passports of citizens of all other countries! Select names, and countries of orig..