LeetCode（数据库）- Number of Accounts That Did Not Stream

Posted 2022-02-07 程序员牧码

题目链接：点击打开链接

题目大意：略。

解题思路：略。

AC 代码

-- 解决方案(1)
SELECT COUNT(*) accounts_count
FROM Subscriptions
WHERE '2021-01-01' BETWEEN start_date AND end_date AND account_id NOT IN (SELECT account_id FROM Streams WHERE YEAR(stream_date) = '2021')

-- 解决方案(2)
SELECT COUNT(SU.ACCOUNT_ID) accounts_count 
FROM Subscriptions SU 
WHERE SU.END_DATE>=TO_DATE('2021-01-01','YYYY-MM-DD')
AND NOT EXISTS
(SELECT 1 FROM STREAMS ST 
WHERE ST.ACCOUNT_ID=SU.ACCOUNT_ID
AND EXTRACT(YEAR FROM ST.STREAM_DATE)=2021)