How to set a specific time interval for different work shifts to retrieve data

问题

I have two working shifts: 8:00:00 to 16:30:00 and 20:00:00 to 06:00:00. I want to create a stored procedure that will retrieve data from an SQL table when I pass the date

this are my tables Table1 Emp

ID   DateTime                 EmpID
47   2014-12-05 08:00:00      1111
47   2014-12-05 08:25:00      1235
47   2014-12-05 23:55:00      4569
47   2014-12-06 00:00:00      4563
47   2014-12-06 02:00:00      7412
59   2014-12-06 04:00:00      8523
59   2014-12-05 10:30:00      5632

Table2 Product

ID     DateTime              ProductMade
47     2014-12-05 11:00:00   Milk
47     2014-12-05 08:00:00   Juice
47     2014-12-06 00:00:00   Bread
47     2014-12-06 06:00:00   Cakes

query for shift 2 18:00 to 06:00

SELECT *  
FROM Table 1  as T1 
INNER JOIN Table_Product as Prod ON t1.ID=Prod.ID 
WHERE  T1.DateTime BETWEEN DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()-8), 0) + '18:00'
AND DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()-7), 0) + '06:00'

so this will get all the records that has the same ID matching

then i have to do another query for the first shift.

between 08:00 to 16:30

SELECT *  
FROM Table 1  AS T1
INNER JOIN
Table_Product AS Prod ON t1.ID=Prod.ID  
WHERE  DATEDIFF(day, CONVERT(VARCHAR(10), GETDATE(),110), CONVERT(VARCHAR(10), T1.DateTime,110))=-1 AND DATEPART(HOUR,T1.DateTime) BETWEEN '07' AND '16'

How do i make this into one stored procdure and elminate having two queries.

回答1:

Try this if you want it for a specific shift. Then you have to specify @Shift

Declare @Shift char(1),
        @days int
Set @Shift = 'A'  -- will only get information for SHIFT A. Change to B if you want the rest
Set @days = 1

Select * 
from Table1 t
where t.DateTime between 
case when @Shift = 'A' then DateAdd(hour, 8, Convert(date, GetDate() - @days)) 
else DateAdd(hour, 20, Convert(date, GetDate() - @days)) end 
and 
case when @Shift = 'A' then DateAdd(hour, 16, Convert(date, GetDate() - @days)) 
else DateAdd(hour, 30, Convert(date, GetDate() - @days)) end

Specify the Shift and a Date, and it should work.

You can always do something like this as well. This you only have to specify the number of days in the past, and it will retrieve the information and specify the Shift in the first Column

DECLARE @days int
SET @days = 1

Select case when DATEPART(hour, t.DateTime) between 8 and 16 then 'A' else 'B' end AS Shift, *
from Table1 t
where t.DateTime between DateAdd(hour, 8, Convert(date, GetDate() - @days))
and DateAdd(hour, 30, Convert(date, GetDate() - @days))
ORDER BY 1, t.DateTime

回答2:

It seems that you have two shifts per day and the day shift begins before the night shift. So, let's enumerate the shifts and let you choose the one(s) you want that way:

select t.*
from (select t.*,
             row_number() over (partition by cast(sp.datetime as date)
                                order by sp.datetime
                               ) as shiftnumber
      from table t
     ) t
where DATEDIFF(day, CAST(GETDATE() as DATE), CAST(SP.DateTime as DATE)) = -1 and
      shiftnumber = 1;

Note that I also changed the date arithmetic. The conversion to dates uses the built-in DATE type. Converting a date to a string and back to a date is inelegant.

来源：https://stackoverflow.com/questions/27227474/how-to-set-a-specific-time-interval-for-different-work-shifts-to-retrieve-data

标签

sql

sql-server

stored-procedures