Question

我有以下需要

我有一个记录表，记录每天生成的som潜在客户。

现在，我需要在过去10天内针对每天的潜在客户数量进行报告。

让我们说这个表是这样的：

tbl_leads
id int,
first_name nvarchar(100),
last_name nvarchar(100),
created_date datetime

我需要计算每天的潜在客户数量，总计10天。所以结果集看起来应该是这样的：

counted_leads | count_date
5             | 2009-04-30
7             | 2009-04-29
5             | 2009-04-28
7             | 2009-04-27

......等等

任何人都知道如何以最好的方式做到这一点？我目前的解决方案是在c＃中使用foreach进行迭代，但我非常希望将它交给sql服务器而不是sp。

Answer 1

您可以使用：

Select
     count(created_date) as counted_leads,
     created_date as count_date
from
     table
group by
     created_date

Answer 2

您的created_date字段为datetime，因此如果您想按日期排序，则需要在分组工作之前剥去时间：

SELECT COUNT(created_date), created_date 
FROM table 
WHERE DATEDIFF(created_date, getdate()) < 10
GROUP BY convert(varchar, created_date, 101)

Answer 3

最有效的方法是按整数进行聚合，然后转换回日期时间进行演示。

select 
    cast(daybucket - 1 as datetime) as count_date,
    counted_leads
from 
    (select 
         cast(created_date as int) as DayBucket,
         count(*) as counted_leads
     from mytable
     group by cast(created_date as int) ) as countByDay

Answer 4

当你将一个DateTime转换为一个int时，它会在中午“截断”，你可能想要将这一天剥离出去

cast(DATEADD(DAY, DATEDIFF(DAY, 0, created_date), 0) as int) as DayBucket

Answer 5

Select count(created_date) total
     , created_dt
  from table
group by created_date
order by created_date desc

Answer 6

CREATE PROCEDURE [dbo].[sp_Myforeach_Date]
    -- Add the parameters for the stored procedure here
    @SatrtDate as DateTime,
    @EndDate as dateTime,
    @DatePart as varchar(2),
    @OutPutFormat as int 
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    Declare @DateList Table
    (Date varchar(50))

    WHILE @SatrtDate<= @EndDate
    BEGIN
    INSERT @DateList (Date) values(Convert(varchar,@SatrtDate,@OutPutFormat))
    IF Upper(@DatePart)='DD'
    SET @SatrtDate= DateAdd(dd,1,@SatrtDate)
    IF Upper(@DatePart)='MM'
    SET @SatrtDate= DateAdd(mm,1,@SatrtDate)
    IF Upper(@DatePart)='YY'
    SET @SatrtDate= DateAdd(yy,1,@SatrtDate)
    END 
    SELECT * FROM @DateList
END

只需输入此代码并以这种方式调用SP

exec sp_Myforeach_Date @SatrtDate='03 Jan 2010',@EndDate='03 Mar 2010',@DatePart='dd',@OutPutFormat=106

由于的 Suvabrata Roy ICRA Online Ltd. Kolkata

Answer 7

我有类似的问题，但我涉及一个列Convert（date，mydatetime）。我必须改变最佳答案如下：

Select
     count(created_date) as counted_leads,
     Convert(date,created_date) as count_date 
from table
group by Convert(date,created_date)

每个日期的SQL计数

7 个答案: