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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
2025-02-27 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
2025-02-27 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
2025-02-27 必过(3, -8)的一元一次函数  
select * from numbers_for_fun 
where a = 0
and
3*b+c = -8
2025-02-27 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
2025-02-27 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
2025-02-27 特定渠道的中档单价用户  
select * from apple_pchs_rcd 
where
product_price >= 3000
and
order_channel = '官网'
and
payment_method = 'Apple Pay'
order by
order_id
2025-02-27 特定渠道的中档单价用户  
select * from apple_pchs_rcd 
where
product_price >= 3000
and
order_channel = '官网'
and
product_type = 'Apple Pay'
order by
order_id
2025-02-27 特定渠道的中档单价用户  
select * from apple_pchs_rcd 
where
product_price >= 3000
and
order_channel = '官网'
order by
order_id
2025-02-27 特定渠道的中档单价用户  
select * from apple_pchs_rcd 
where
product_price >= 3000
order by
order_id
2025-02-27 文科潜力股  
select * from scores 
where ((subject = '历史'and score >= 90)
or
(subject = '政治'and score >=90)
or
(subject = '地理'and score >=90)
)
and exam_date = '2024-06-30'
2025-02-27 给英语成绩中上水平的学生拔尖  
select * from scores where subject ='英语' and score between '100' and '110'
and exam_date = '2024-06-30'
order by score desc
2025-02-27 给英语成绩中上水平的学生拔尖  
select * from scores where subject ='英语' and score between '100' and '110'
order by score desc
2025-02-27 给英语成绩中上水平的学生拔尖  
select * from scores where subject ='英语' and score between '100' and '110'
2025-02-27 找出三个班级的女生  
select * from students where gender = 'f' and class_code in ('c219','c220','c221')
order by student_id
2025-02-27 找出三个班级的女生  
select * from students where gender = 'f' and class_code in ('c219','c211','c210')
order by student_id
2025-02-27 大于J小于K的手牌  
select * from hand_permutations 
where card1 between 'j' and 'k' and card2 between 'j' and 'k'
2025-02-27 2000年以前出生的男歌手  
select * from singer_info where birth_date < '2000-01-01' and gender = 'm'
2025-02-27 2000年以前出生的男歌手  
select * from singer_info where birth_date < '2000-01-01' and gender = 'f'
2025-02-27 2000年以前出生的男歌手  
select * from singer_info where birth_date < '2000-01-01'
2025-02-27 2000年以前出生的男歌手  
select * from singer_info where birth_date <= '2000-01-01'