一、原题 链接:Training on Likes Vs Dislikes | Codewars YouTube had a like and a dislike button, which allowed users to express their opinions about particular content. It was set up in such a way that you
sql提高 集合 union all 合集,且重复 select * from T_OWNERSunion allselect * from t_userAddress union 合集,去重复 // 字段位置、个数必须一致,不一致就容易报错select * from T_OWNERSunion select * from t_userAddress inters
一、原题 链接:Training on Two to One | Codewars Take 2 strings s1 and s2 including only letters from a to z. Return a new sorted string (alphabetical ascending), the longest possible, containing distinct