题解 | #统计复旦用户8月练题情况#
统计复旦用户8月练题情况
https://www.nowcoder.com/practice/53235096538a456b9220fce120c062b3
SELECT device_id, university, COUNT(*), COUNT( CASE WHEN result="right" THEN 1 ELSE NULL END) FROM ( SELECT u.device_id,university,result FROM user_profile u LEFT JOIN question_practice_detail q ON u.device_id=q.device_id WHERE result IS NOT NULL AND university="复旦大学" ) t GROUP BY device_id,university
投递华为等公司10个岗位 >
