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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。

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提交记录

提交日期 题目名称 提交代码
2026-03-31 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 = 0
2026-03-31 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 = 0
limit 5;
2026-03-31 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
2026-03-31 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
limit 5;
2026-03-31 必过(3, -8)的一元一次函数  
select * 
from numbers_for_fun 
where a = 0 and b<>0 and (3*b+c)= -8
order by id
2026-03-31 必过(3, -8)的一元一次函数  
select * 
from numbers_for_fun 
where a = 0 and b<>0 and (3*b+c)= -8
order by id
limit 5;
2026-03-31 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 
order by id
2026-03-31 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 
order by id
limit 5;
2026-03-31 特定渠道的中档单价用户  
select * 
from apple_pchs_rcd 
where payment_method = 'Apple Pay' and order_channel='官网' and product_price >= 3000 
order by order_id
2026-03-31 特定渠道的中档单价用户  
select * 
from apple_pchs_rcd 
where payment_method = 'Apple Pay' and order_channel='官网' and product_price >= 3000 
order by order_id
limit 5;
2026-03-31 特定渠道的中档单价用户  
select * 
from apple_pchs_rcd 
where payment_method = 'Apple Pay' and product_price >= 3000 
order by order_id
limit 5;
2026-03-31 文科潜力股  
select * 
from scores
where (subject = '历史' and score >=90 and exam_date = '2024-06-30')
or (subject = '政治' and score >=90 and exam_date = '2024-06-30')
or (subject = '地理' and score >=90 and exam_date = '2024-06-30')
order by score desc,student_id,subject
2026-03-31 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
2026-03-31 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;
2026-03-31 找出三个班级的女生  
select * 
from students 
where class_code in('C219' , 'C220','C221') AND (gender = 'f')
limit 5;
2026-03-31 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
limit 5;
2026-03-31 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'
2026-03-31 2000年以前出生的男歌手  
select * 
from singer_info 
where birth_date < '2000-01-01'and gender = 'm'
2026-03-31 总分超过300分的学生  
select student_id 
from subject_score 
where (math + chinese + english) >= 300
2026-03-31 总分超过300分的学生  
select student_id 
from subject_score 
where (math + chinese + english) >= 300
limit 5;