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提交记录
| 提交日期 | 题目名称 | 提交代码 |
|---|---|---|
| 2025-12-08 | 替换空格  |
select replace(singer_name,' ','') as new_singer_name from singer_info |
| 2025-12-08 | 美狗计  |
select replace(song_name,'人','狗') as new_song_name from song_info where song_name like '%人%' |
| 2025-12-08 | 名字中字母e左起小于等于3位的歌手  |
select
singer_name
, case when locate('e', singer_name) in(1,2,3) then 1 else 0 end as if_e_lessthan3
from singer_info
|
| 2025-12-08 | 按歌手名字字符长度统计歌手个数  |
select length(singer_name), count(singer_id) from singer_info group by 1 |
| 2025-12-08 | 按歌手名字字符长度统计歌手个数  |
select length(singer_name) from singer_info group by 1 having count(singer_id) |
| 2025-12-08 | 统计字符长度  |
select singer_name, char_length(singer_name) as len from singer_info |
| 2025-12-08 | 歌手名字大写  |
select upper(singer_name) from singer_info |
| 2025-12-08 | 基于共同兴趣爱好的餐厅推荐(1)-我吃过啥  |
select cust_uid, mch_nm from mt_trx_rcd1 where cust_uid='MT10000' group by cust_uid, mch_nm order by 2 |
| 2025-12-08 | 不经过第二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 |
| 2025-12-08 | 找出与y=x有交点的所有一元一次函数  |
select * from numbers_for_fun where a=0 and b!=1 and b!=0 order by id |
| 2025-12-08 | 找出与X轴交点小于等于0的一元一次函数  |
select * from numbers_for_fun where a=0 and b<>0 and b*c>=0 order by id |
| 2025-12-08 | 找出与X轴交点大于0的一元一次函数  |
select * from numbers_for_fun where a=0 and b<>0 and b*c<0 order by id asc |
| 2025-12-08 | 找出所有经过原点的一元一次函数  |
select * from numbers_for_fun where (a, c) IN ((0, 0)) and b<>0 order by id |
| 2025-12-08 | 找出所有一元一次函数  |
select * from numbers_for_fun where a=0 and b!=0 order by id |
| 2025-12-08 | 输出特定日期上市的银行  |
select * from stock_info where area = '北京' and industry='银行' and list_date between '2006-06-01' and '2006-09-01' order by list_date |
| 2025-12-08 | A和K之间的手牌(3)  |
select * from hand_permutations where card1 between 'A' and 'K' and card2 between 'A' and 'K' order by id |
| 2025-12-08 | A和K之间的手牌(2)  |
select * from hand_permutations where card1 between 'A' and 'K' or card2 between 'A' and 'K' order by id |
| 2025-12-08 | A和K之间的手牌(1)  |
select * from hand_permutations where card1 between 'a' and 'k' |
| 2025-12-08 | 交易金额在5000至10000(含边界)的所有交易  |
select * from cmb_usr_trx_rcd where trx_amt between 5000 and 10000 order by trx_amt desc limit 5 |
| 2025-12-08 | 交易金额大于10000元的所有交易  |
select * from cmb_usr_trx_rcd where trx_amt >=100000 order by trx_amt desc |