Question

Using SQL Server 2000

My Query.

SELECT 
  (Format(IIf(CLng(OutTime) > 180000, CDate('18:00:00'),  CDate(Format(OutTime, '00:00:00'))) - IIf(CLng(InTime) < 90000,  CDate('09:00:00'), CDate(Format(InTime, '00:00:00'))), 'hh:nn:ss')) As WorkTime, 
  (Format(IIf(CLng(InTime) < 90000, CDate('09:00:00') -  CDate(Format(InTime, '00:00:00')), 0) + IIf(CLng(OutTime) > 180000,  CDate(Format(OutTime, '00:00:00')) - CDate('18:00:00'), 0), 'hh:nn:ss')) As OverTime 
FROM table

Above query is Access Query, I want to write a same query in sql.

Condition.

I want to Calculate the time after 090000(HH:MM:SS) before 180000 comes in worktime, before
090000 after 180000 comes in overtime.

Intime, Outime data type is varchar in the database

Am new to SQL Server 2000

How to write a SQL query from the above same?

Answer 1

Here is literally translated query to TSQL 2000.
Although, it could be rewritten for better performance:

Select Convert(char(8),
           case when DateAdd(Day,-DateDiff(Day, 0, OutTime), OutTime)>'18:00:00' 
                Then Cast('18:00:00' as datetime) 
                Else DateAdd(Day,-DateDiff(Day, 0, OutTime), OutTime) 
           End 
           - 
           Case when DateAdd(Day,-DateDiff(Day, 0, InTime),  InTime) <'09:00:00' 
                Then Cast('09:00:00' as datetime) 
                Else DateAdd(Day,-DateDiff(Day, 0, InTime),  InTime) 
           End, 
           8
          ) as WorkTime,
   Convert(char(8),
           Case when DateAdd(Day,-DateDiff(Day, 0, InTime),  InTime) <'09:00:00' 
                Then Cast('09:00:00' as datetime) - 
                     DateAdd(Day,-DateDiff(Day, 0, InTime),  InTime)
                Else Cast('00:00:00' as datetime) 
           End 
           + 
           case when DateAdd(Day,-DateDiff(Day, 0, OutTime), OutTime)>'18:00:00' 
                Then DateAdd(Day,-DateDiff(Day, 0, OutTime), OutTime) - 
                     Cast('18:00:00' as datetime) 
                Else Cast('00:00:00' as datetime) 
           End, 
           8
          ) as OverTime
From Table

Added later:

If InTime and OutTime have time part only (Date part is Jan 1 1900) you can use directly InTime and OutTime. Otherwise you have to extract time part from datetime column, as:

  DateAdd(Day,-DateDiff(Day, 0, OutTime),  OutTime)

(this is the fastest way to get time part only)

Instead of:

   DateAdd(Day,-DateDiff(Day, 0, OutTime), OutTime)>'18:00:00'

You can use

   Datepart(hh,OutTime)>17

P.S. as your time is stored as string yoiu don’t need to get time part only. You can cast them to datetime, or you can write also

 cast(left(inTime,2) as int) < 9