将行名转换为列名，并按日期求和并显示数据

Question

我想为以下问题写一个查询。

我想将行名转换为列名，并按日期求和并显示数据

例子：

NAME	Start Date Time	End Date time
Noida	06-03-2020 06:30	06-03-2020 07:30
Noida	07-03-2020 08:54	07-03-2020 09:45
Noida	06-03-2020 03:30	06-03-2020 05:30
Noida	08-03-2020 04:55	08-03-2020 06:30
Delhi	08-03-2020 04:40	08-03-2020 05:30
Delhi	14-03-2020 04:40	14-03-2020 05:30

现在我们要做的是： 返回日期数据，然后对该日期的总时间求和，即名称明智，行“名称”转换为列名称，如果任何日期的数据不可用，则写入“无数据”。

预期结果将是：

Date_Wise	Noida_total_ Time	Delhi_total_ Time
06-03-2020	03:00:00	No data
07-03-2020	00:51:00	No data
08-03-2020	01:35:00	00:50:00
14-03-2020	No data	00:50:00

• 第一行：日期为 2020 年 3 月 3 日，然后是诺伊达总时间的总和，然后德里没有 2020 年 6 月 3 日的任何数据，因此我们写为“无数据”。

同样适用于所有行。

Answer 1

我们可以在这里使用日历表方法：

SELECT
    SUM(CASE WHEN t.NAME = 'Noida' 
             THEN DATEDIFF(hour, [Start Date Time], [End Date Time]) ELSE 0
        END) AS Noida_total_Time,
    SUM(CASE WHEN t.NAME = 'Delhi' 
             THEN DATEDIFF(hour, [Start Date Time], [End Date Time]) ELSE 0
        END) AS Delhi_total_Time
FROM (SELECT DISTINCT CAST([Start Date Time] AS date) AS Date_Wise FROM yourTable) d
LEFT JOIN yourTable t
    ON d.Date_Wise = CAST(t.[Start Date Time] AS date)
GROUP BY
    d.Date_Wise
ORDER BY
    d.Date_Wise;

Answer 2

给你：

declare
    @t table ([NAME] varchar (100), [Start Date Time] datetime, [End DAte time] datetime)   

declare
    @t2 table (rn int, dates date)

declare
    @t_res table (Date_Wise date, [Noida_total_ Time] varchar (100), [Delhi_total_ Time] varchar (100))

declare
    @i int=1, @d date

insert @t  
select 'Noida', convert(datetime, '06-03-2020 06:30', 105), convert(datetime, '06-03-2020 07:30' , 105)
union all
select 'Noida', convert(datetime, '07-03-2020 08:54' , 105),    convert(datetime, '07-03-2020 09:45' , 105)
union all
select 'Noida', convert(datetime, '06-03-2020 03:30' , 105),    convert(datetime, '06-03-2020 05:30' , 105)
union all
select 'Noida', convert(datetime, '08-03-2020 04:55' , 105),    convert(datetime, '08-03-2020 06:30' , 105)
union all
select 'Delhi', convert(datetime, '08-03-2020 04:40' , 105),    convert(datetime, '08-03-2020 05:30' , 105)
union all
select 'Delhi', convert(datetime, '14-03-2020 04:40' , 105),    convert(datetime, '14-03-2020 05:30' , 105)

insert into @t2
select ROW_NUMBER() over (order by (select dates)), dates from (
    select distinct cast([Start Date Time] as date) dates from @t
    union
    select distinct cast([End DAte time] as date) from @t
    )t

declare
    @dur_n time
    ,@dur_d time
    

while @i<=(select max(rn) from @t2 )
begin
    select @d=dates from @t2 where rn=@i

    select @dur_n=CONVERT(varchar, DATEADD(ms, datediff(ss, min(t), max(t)) * 1000, 0), 114)
    from (
        select [Start Date Time] t from @t where cast([Start Date Time] as date) =@d and [NAME]='Noida'
        union all
        select [End DAte time] t from @t where cast([End DAte time]  as date) =@d and [NAME]='Noida'
    )t1


    select @dur_d=CONVERT(varchar, DATEADD(ms, datediff(ss, min(t), max(t)) * 1000, 0), 114)
    from (
        select [Start Date Time] t from @t where cast([Start Date Time] as date) =@d and [NAME]='Delhi'
        union all
        select [End DAte time] t from @t where cast([End DAte time]  as date) =@d and [NAME]='Delhi'
    )t1


    set @i=@i+1

    insert into @t_res
    select @d, isnull(cast(@dur_n as varchar(100)), 'No data'), isnull(cast(@dur_d as varchar(100)), 'No data')
end

select * from  @t_res