思路:去除重复项需要用到关键字DISTINCT
代码解释:从表user_profile
中取出 去除了重复项的列university
SELECT DISTINCT university FROM user_profile;
题目:https://www.nowcoder.com/practice/82ebd89f12cf48efba0fecb392e193dd?tpId=199&tags=&title=&difficulty=0&judgeStatus=0&rp=0&sourceUrl=%2Fexam%2Foj%3Fpage%3D1%26tab%3DSQL%25E7%25AF%2587%26topicId%3D199