排名

用户解题统计

过去一年提交了

勋章 ①金银铜：在竞赛中获得第一二三名；②好习惯：自然月10天提交；③里程碑：解决1/2/5/10/20/50/100/200题；④每周打卡挑战：完成每周5题，每年1月1日清零。

错题集 数据思维刷题中答错的题目

模块 知识点 题目 你的答案 正确答案 操作
暂无错题，继续保持！

收藏

收藏日期 题目名称 解决状态
没有收藏的题目。

评论笔记

评论日期 题目名称 评论内容 站长评论
没有评论过的题目。

提交记录

提交日期 题目名称 提交代码
2026-07-06 与X轴有且只有一个交点的一元二次函数  
select * from numbers_for_fun 
where a != 0 and b*b=4*a*c
order by id ;
2026-07-06 开口向上且经过原点的一元二次函数  
select * from numbers_for_fun 
where a > 0 and c=0
order by id ;
2026-07-06 开口向上且经过原点的一元二次函数  
select * from numbers_for_fun 
where a != 0 and c=0
order by id ;
2026-07-06 开口向上且经过原点的一元二次函数  
select * from numbers_for_fun 
where a != 0 and c=0;
2026-07-06 开口向上且经过原点的一元二次函数  
select * from numbers_for_fun 
where a != 0 and (b*b-4 * a * c)=0;
2026-07-06 必过(3, -8)的一元一次函数  
select * from numbers_for_fun 
where a = 0 and 3*b + c = -8;
2026-07-06 不经过第三象限的一元一次函数  
select * from numbers_for_fun 
where a = 0 and b < 0 and c >= 0;
2026-07-03 德州扑克起手牌-最强起手牌KK+  
select * from hand_permutations where (left(card1,1) = "A" or left(card1,1) = "K" )and (left(card2,1) = "A" or left(card2,1) = "K");
2026-07-03 德州扑克起手牌-最强起手牌KK+  
select * from hand_permutations where left(card1,1) = "A" or left(card1,1) = "K" and left(card2,1) = "A" or left(card2,1) = "K";
2026-04-17 不经过第三象限的一元一次函数  
select * from numbers_for_fun 
WHERE b < 0 AND a = 0 AND c >= 0
order by id;
2026-04-17 不经过第三象限的一元一次函数  
select * from numbers_for_fun 
WHERE b >= 0 AND a = 0 AND c = 0
order by id;
2026-04-17 不经过第三象限的一元一次函数  
select * from numbers_for_fun 
WHERE b > 0 AND a = 0 AND c = 0
order by id;
2026-04-17 特定渠道的中档单价用户  
select * from apple_pchs_rcd 
 WHERE order_channel = '官网' AND payment_method = 'Apple Pay' AND product_price >= 3000
 ORDER BY order_id;
2026-04-17 文科潜力股  
select * from scores
 WHERE exam_date = '2024-06-30' AND subject IN ('历史','政治','地理') AND score >= 90
 order by score desc ,student_id,subject;
2026-04-17 给英语成绩中上水平的学生拔尖  
select * from scores where
exam_date = '2024-06-30' AND subject = '英语' AND(`score` BETWEEN 100 AND 110) 
order by score desc
;
2026-04-17 找出三个班级的女生  
select * from students
WHERE class_code IN('C219','C220','C221') AND gender = 'f' order by student_id;
2026-04-17 大于J小于K的手牌  
select 
    * 
from 
    hand_permutations
where 
    card1 > 'J'  and card1 < 'K'
    and 
     card2 > 'J'  and card2 < 'K'
2026-04-17 大于J小于K的手牌  
select * from hand_permutations 
WHERE LEFT(card1,1) ='Q' AND LEFT(card2,1) ='Q'
ORDER BY id;
2026-04-17 2000年以前出生的男歌手  
select * from singer_info 
WHERE birth_date < '2000-01-01'AND gender='m';
2026-04-17 总分超过300分的学生  
select student_id from subject_score 
WHERE (chinese+math+english)>=300;