Can't Get SQL to pull Correct DateTime - tsql

Question

So I am running into an issue and for the life of me i can't figure out how to get the data I am looking for.
What I am trying to do is get a collection of data between a certain Date/Time, the way the database was set up the date and time is in different columns and the way its formatted is yyyyMMDD for the date and hhmmss for the time. (Not sure if this would matter but i just want to make sure i explain everything) The Data is located in an old DB2 server, I am using a linked server in SSMS to pull the data over. The part of the query I am having trouble with is
SELECT *
FROM WM370BASD.PRTRAN00 A
WHERE
(
A.PRTXTP = '300'
AND A.PRTXCD = '003'
AND A.PREDDT >= 20210901 --BEGIN DATE
AND A.PREDDT <= 20210901 --END DATE
AND A.PREDTI >= 060000 --BEGIN TIME
AND A.PREDTI <= 140000 --END TIME
)
OR
( A.PRTXTP = '200'
AND A.PRTXCD = '001'
AND A.PREDDT >= 20210901 --BEGIN DATE
AND A.PREDDT <= 20210901 --END DATE
AND A.PREDTI >= 060000 --BEGIN TIME
AND A.PREDTI <= 140000 --END TIME
AND A.PRMNOP = 'Dir Putaway'
)
OR
( A.PRTXTP = '200'
AND A.PRTXCD = '001'
AND A.PREDDT >= 20210901 --BEGIN DATE
AND A.PREDDT <= 20210901 --END DATE
AND A.PREDTI >= 060000 --BEGIN TIME
AND A.PREDTI <= 140000 --END TIME
AND A.PRMNOP = 'Locate Cases'
)
OR
( A.PRTXTP = '200'
AND A.PRTXCD = '001'
AND A.PREDDT >= 20210901 --BEGIN DATE
AND A.PREDDT <= 20210901 --END DATE
AND A.PREDTI >= 060000 --BEGIN TIME
AND A.PREDTI <= 140000 --END TIME
AND A.PRMNOP = 'SKU Putaway'
)
OR
( A.PRTXTP = '200'
AND A.PRTXCD = '002'
AND A.PREDDT >= 20210901 --BEGIN DATE
AND A.PREDDT <= 20210901 --END DATE
AND A.PREDTI >= 060000 --BEGIN TIME
AND A.PREDTI <= 140000 --END TIME
AND A.PRMNOP = 'Pull Cases-Bulk'
)
EDIT --Added result set
PREDTI PREDDT
60001 20210901
60005 20210901
60010 20210901
60012 20210901
60012 20210901
60013 20210901
60024 20210901
60025 20210901
60032 20210901
60042 20210901
135950 20210901
135947 20210901
135938 20210901
135937 20210901
135934 20210901
135928 20210901
135923 20210901
135923 20210901
135921 20210901
135918 20210901
It works fine as long as the day is the same day, However if I would span it across a day, it returns nothing....
AND A.PREDDT >= 20210821 --BEGIN DATE
AND A.PREDDT <= 20210901 --END DATE
AND A.PREDTI >= 140000 --BEGIN TIME
AND A.PREDTI <= 030000 --END TIME
I figure whatever the issue is is small and stupid and i am just overlooking it, i would appreciate a fresh set of eyes!

Answer 1

The following condition will ALWAYS be false because a number cannot be less than 30000 and greater than 140000 at the same time.
AND A.PREDTI >= 140000 --BEGIN TIME
AND A.PREDTI <= 030000 --END TIME
Making it as follows:
AND ( A.PREDTI >= 140000 --BEGIN TIME
OR A.PREDTI <= 030000 ) --END TIME
Using parenthesis because AND takes precedence over OR and using OR instead of AND. Now it should return results sometimes, but without understanding your logic or intent, I can't say if it is correct or not.
I recommend using DateTime type instead of integers as it is created specifically for that purpose.
You would run into other issues if you use integers the way you do.
Edit:
If I understand what you want correctly, you want from 21/8 to 1/9 and the time be between 14:00 and 3:00 (the next day).
So on 21/8 the time must be after 14:00
On 22/8 to 1/9 the time must be before 3:00 or after 14:00
On 2/9 (next day) the time must be before 3:00
This can be expressed with the following expression:
AND (
A.PREDDT >= 20210822 AND A.PREDDT <= 20210901
AND (A.PREDTI >= 140000 OR A.PREDTI <= 030000)
OR A.PREDDT = 20210902 AND A.PREDTI <= 030000
OR A.PREDDT = 20210821 AND A.PREDTI >= 140000
)