Question

经过长时间的搜索，我发现了我正在寻找的剧本。工作良好。但有一方面是错误的：日期和时间。通常我应该收到

5   2014-02-24 14:59:28     7   NULL    
5   2014-02-24 15:32:55     6   -1  
5   2014-03-08 10:32:19     60  54  
5   2014-03-08 10:40:23     20  -40     
5   2014-03-08 10:44:22     21  1   
5   2014-03-08 15:05:54     2   -19     
5   2014-03-08 15:06:10     25  23

但我得到了：

5   2014-02-24 02:59:28     7   NULL    NULL
5   2014-02-24 03:32:55     6   -1  -14.2857%
5   2014-03-08 03:05:54     2   -19     -90.4762%
5   2014-03-08 03:06:10     25  23  1150.0000%
5   2014-03-08 10:32:19     60  54  900.0000%
5   2014-03-08 10:40:23     20  -40     -66.6667%
5   2014-03-08 10:44:22     21  1   5.0000%

这只是stock_id的例子5.其他人也错了时间。我的代码如下：

select stock_id,date_format(date,'%Y-%m-%d %h:%i:%s') as date
, price,pxchange,concat(round(pxpct*100,4),'%') pxpct
from (select 
     case when stock_id <> @pxticker then 
         @pxclose := null end,
    p.*,
    (price-@pxclose) as pxchange,
    (price-@pxclose)/@pxclose as pxpct,
    (@pxclose := price),
    (@pxticker := stock_id)
  from quotations p
  cross join
  (  select 
     @pxclose := null,
     @pxticker := stock_id
     from quotations 
     order by stock_id, date limit 1)  as a
  order by stock_id, date ) as b
order by stock_id, date asc

但出了什么问题？我添加（日期，'％Y-％m-％d％h：％i：％s'）对，不是吗？谁知道问题出在哪里？

编辑 - 附加问题和代码

SELECT 
stock_id, stocks.name,
date_format( date, '%Y-%m-%d %H:%i:%s' ) AS date, 
price, 
pxchange, 
concat( round( pxpct *100, 4 ) , '%' ) pxpct, 
stocks.stockmarket, 
stockmarkets.id

FROM (
SELECT
CASE WHEN stock_id <> @pxticker
THEN @pxclose := NULL
END , p . * , 
(price - @pxclose) AS pxchange, 
(price - @pxclose) / @pxclose AS pxpct, 
(@pxclose := price), 
(@pxticker := stock_id)

FROM quotations p

CROSS JOIN 
(
SELECT @pxclose := NULL , @pxticker := stock_id
FROM quotations
ORDER BY stock_id, date
LIMIT 1
) AS a
ORDER BY stock_id, date
) AS b 

LEFT JOIN 
stocks ON stock_id = stocks.id
LEFT JOIN
stockmarkets ON stockmarkets.id = stocks.stockmarket 
WHERE stocks.stockmarket = (SELECT id FROM stockmarkets WHERE short ='NASDAQ')
GROUP BY stock_id
ORDER BY stock_id, MIN(date) ASC

Answer 1

日期函数需要一个大写字母H，输出为24小时格式，否则它将输出AM / PM日期，没有AM / PM符号（即仅从0-11小时开始）。

MySql查询显示错误的时间，但日期是正确的

1 个答案: