http://xuesql.cn/lesson/filtering_sorting_query_results
distinct
--请输入sql
--SELECT * FROM movies;
--distinct 排重(去掉重复的数据)
--select distinct director from movies order by director asc;
--order by排序 limit显示数据 最新的话就是降序(从大到小)
--select * from movies order by Year desc limit 4;
--select * from movies order by title asc limit 5;
--这个有个坑就是第一个5是数据的索引开始,第二个5是显示数据的行数
--select * from movies order by Title asc limit 5,5
select Title from movies where Director="John Lasseter" order by Length_minutes limit 3
这题不会做