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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
2026-04-17 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;
2026-04-16 德州扑克起手牌- A花  
select * from hand_permutations 
WHERE RIGHT(`card1`,1)=RIGHT(`card2`,1) AND(LEFT(`card1`,1)='A' OR LEFT(`card2`,1)='A' )
;
2026-04-16 德州扑克起手牌- A花  
select * from hand_permutations 
WHERE RIGHT(`card1`,1)=RIGHT(`card2`,1) AND LEFT(`card1`,1)='A' OR RIGHT(`card1`,1)=RIGHT(`card2`,1) AND LEFT(`card2`,1)='A' 
;
2026-04-16 德州扑克起手牌- A花  
select * from hand_permutations 
WHERE RIGHT(`card1`,1)=RIGHT(`card2`,1) AND LEFT(`card1`,1)='A' OR LEFT(`card2`,1)='A' 
;
2026-04-16 德州扑克起手牌- A花  
select * from hand_permutations 
WHERE RIGHT(`card1`,1)=RIGHT(`card2`,1)
;
2026-04-16 德州扑克起手牌-最强起手牌KK+  
select * from hand_permutations 
WHERE LEFT(`card1`,1) IN ('A','K') AND LEFT(`card2`,1) IN ('A','K')
;
2026-04-16 国庆假期后第一天涨幅高于1%的股票  
select distinct ts_code from daily_stock_prices
where pct_change > '0.01' AND trade_date >= '2023-10-08' AND trade_date like '2023%'
;