mysql，多列分组

4sup72z8 于 2021-06-19 发布在 Mysql

关注(0)|答案(2)|浏览(342)

我有两张table。示例数据查询：cmadjprice:

select symbol,close,timestamp from cmadjprice;
ABCD,815.9,2014-10-31
ABCD,808.85,2014-11-03
ABCD,797.4,2014-11-05
ABCD,776.55,2014-11-07
ABCD,800.85,2014-11-10
ABCD,808.9,2014-11-11
ABCD,826.8,2014-11-12
ABCD,856.45,2014-11-13
ABCD,856.65,2014-11-14

bb03表格输出示例查询

select symbol,enter_dt,enter_price,exit_dt,exit_price from bb03 ;
ABCD,2014-10-31,815.90,2018-07-27,1073.60

我正在寻找同一日期的最高收盘价。

select a.symbol, max(a.close) ,a.timestamp  from  cmadjprice a
inner join BB03 b on a.symbol = b.symbol
where a.timestamp between b.enter_dt and b.exit_dt
group by a.symbol,a.timestamp;

我没有得到输出？请在此期望的输出上提供帮助

ABCD,2014-10-31,815.90,2018-07-27,1073.60,856.65,2014-11-14;

mysql group-by

来源：https://stackoverflow.com/questions/52913609/mysql-grouping-with-multiple-columns

2条答案

按热度按时间

t3psigkw1#

我想这就是你需要的：
注意，如果最大关闭值在与给定符号相关的时间戳序列中出现不止一次，则这可能返回多个记录

select c.symbol, c.maxval, d.timestamp from 
(
select 
a.symbol, 
max(a.close) as maxval 
from  
cmadjprice a
inner join BB03 b 
on a.symbol = b.symbol 
where a.timestamp between b.enter_dt and b.exit_dt
group by a.symbol
) c
inner join
cmadjprice d
on c.symbol = d.symbol and c.maxval = d.close
;

赞(0）回复(0）举报 2021-06-20

htzpubme2#

请尝试以下操作：

select a.symbol, max(cast(a.close as DECIMAL(5,2)))  from  cmadjprice a
inner join BB03 b on a.symbol = b.symbol
where a.timestamp between b.enter_dt and b.exit_dt
group by a.symbol;

赞(0）回复(0）举报 2021-06-20

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mysql，多列分组

2条答案

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