如何從多個表

Question

我有一個測驗應用兩個表返回結果：

[Questions] 
_id, question, correctAnswerId 

[Answers] 
_id, answer, questionId 

當我查詢一個問題，例如

SELECT question FROM Questions WHERE _id = 2 

我也想得到與該問題相關的（正確和不正確的）答案。我怎樣才能一次查詢問題和答案，所以我不必單獨查詢答案？

Answer 1

使用JOIN：

SELECT q.question, a.answer 
FROM Questions q JOIN Answers a ON q._id = a.questionId 
WHERE q._id = 2