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Consider a database which contains people and their respective residence histories: Which of the following queries will return all the people that have never lived
Consider a database which contains people and their respective residence histories:
Which of the following queries will return all the people that have never lived in Boston? Select all that apply.
SELECT p
FROM people p
JOIN residencehistory ON ppersonid rpersonid
WHERE rcity 'Boston'
SELECT p
FROM people p
LEFT JOIN residencehistory ON ppersonid rpersonid
WHERE rcity 'Boston'
SELECT p
FROM people p
WHERE NOT EXISTS
SELECT
FROM residencehistory
WHERE ppersonid rpersonid AND city 'Boston'
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