Question

我被困在mysql查询上，我想要一个新列（总行）来显示返回行的总数，所以例如返回行是5，我希望每列（总行）在每个单独显示5行。但是，当我在同一查询中执行分组时，它会将其拆分并在每个中显示1。我如何做到这一点，以免它被＆＃34;组打扰，可能是计数的总和？

我原来的查询我尝试失败了：

select  curdate() as todays_date, qty as Quantity, plu as Item_ID, item as Description,
sum(count(distinct plu)) from transact where qdate  between '2013-07-01' and '2014-07-10'
and location ='8' group by plu;

sum（count（distinct plu））不起作用，任何执行相同功能的查询？

由于

编辑：

以下是查询的一些结果。

'2014-08-08', '6', '1', '', 'MUM NAME RIBBON', '1'
'2014-08-08', '8', '1', '698-1284C-01-AS', 'Fearless Friar Sweatshirts AS', '1'
'2014-08-08', '8', '1', '698-1584-01-L', 'Shield Sweatshirts (new & old) L', '1'
'2014-08-08', '8', '1', '718103072885', 'Composition Book', '1'
'2014-08-08', '8', '1', '93546AS', 'Sweatshirt - Grey Friars - AS', '1'
'2014-08-08', '4', '1', 'AA01', 'Girls Soccer Game Ticket', '1'
'2014-08-08', '4', '1', 'AA04', 'BASEBALL HATS', '1'
'2014-08-08', '4', '1', 'AA06', 'BASKETBALL FEES', '1'

Answer 1

你不能在一个查询中对一个总和进行计数..这是无效的语法..但是对于你想要做的事情，你需要一个单独的查询来完成计数并且不受原始查询的影响，如此：

SELECT 
    t.todays_date, t.Quantity, t.Item_ID, t.Description, t1.num_plu
FROM
(   SELECT  
        CURDATE() AS todays_date, 
        qty AS Quantity, 
        plu AS Item_ID, 
        item AS Description 
    FROM transact 
    WHERE qdate  BETWEEN ('2013-07-01' AND '2014-07-10')
      AND location ='8' 
    GROUP BY counter
) t
JOIN
(   SELECT
        plu, COUNT(DISTINCT plu) AS num_rows
    FROM transact
    WHERE qdate  BETWEEN ('2013-07-01' AND '2014-07-10')
      AND location ='8' 
) t1 on t1.plu = t.Item_ID

SEE DEMO

mysql如何按组情况查询组中返回的总行数

1 个答案: