有 js css html 基础么?
如果有相关基础可以直接对照开发文档进行初步尝试
如果没有 则需要学习 css3 js 和 html div布局
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回答了问题2019-11-25
【每日一题】SQL 知识大测验 | 持续更新
第六题
select actor_id, director_id from (
select actor_id, director_id,count(*) as count from
table group by actor_id, director_id) base
where
base.count>=3
第二题
select CONCAT(DATE_FORMAT(times, '%Y-%m-%d %H:'),
case FLOOR(DATE_FORMAT(times, '%i') / 15)
when 0 then '00'
when 1 then '15'
when 2 then '30'
when 3 then '45' end
) AS c,
count(*)
from table t
GROUP BY c
ORDER BY times ASC