SQL Server Query for required result - sql-server

Question

I am using SQL Server with my application.
The Table data is as following :
And I want result in following format:
I have tried with split function but its not working properly.
Is it possible to get such a result.
Please suggest.
Thank you.

Answer 1

Try this. I did not manage to get a single Not Req, it is like this ("Not Req/Not Req").
drop table if exists dbo.TableB;
create table dbo.TableB (
OldSPC varchar(100)
, old_freq varchar(100)
, NewSPC varchar(100)
, new_freq varchar(100)
);
insert into dbo.TableB(OldSPC, old_freq, NewSPC, new_freq)
values ('ADH,BAP', '7,7', 'ADH,BAP', '7,7')
, ('Not Req', 'Not Req', 'ADH,BAP', '7,7')
, ('BAP,EXT,ADL', '35,7,42', 'BAP,EXT,BAP,ADL', '21,7,35,42');
select
tt1.OldSPCOldFreq
, tt2.NewSPCNewFreq
from (
select
t.OldSPC, t.old_freq, t.NewSPC, t.new_freq
, STRING_AGG(t1.value + '/' + t2.value, ',') OldSPCOldFreq
from dbo.TableB t
cross apply (
select
ROW_NUMBER () over (order by t.OldSPC) as Rbr
, ss.value
from string_split (t.OldSPC, ',') ss
) t1
cross apply (
select
ROW_NUMBER () over (order by t.old_freq) as Rbr
, ss.value
from string_split (t.old_freq, ',') ss
) t2
where t1.Rbr = t2.Rbr
group by t.OldSPC, t.old_freq, t.NewSPC, t.new_freq
) tt1
inner join (
select
t.OldSPC, t.old_freq, t.NewSPC, t.new_freq
, STRING_AGG(t3.value + '/' + t4.value, ',') NewSPCNewFreq
from dbo.TableB t
cross apply (
select
ROW_NUMBER () over (order by t.NewSPC) as Rbr
, ss.value
from string_split (t.NewSPC, ',') ss
) t3
cross apply (
select
ROW_NUMBER () over (order by t.new_freq) as Rbr
, ss.value
from string_split (t.new_freq, ',') ss
) t4
where t3.Rbr = t4.Rbr
group by t.OldSPC, t.old_freq, t.NewSPC, t.new_freq
) tt2 on tt1.OldSPC = tt2.OldSPC
and tt1.old_freq = tt2.old_freq
and tt1.NewSPC = tt2.NewSPC
and tt1.new_freq = tt2.new_freq

Answer 2

As mentioned in comments, it might be easier for you to do it on front end, but it could be done in SQL Server as well.
Partial Rextester Demo
I didn't replicate your whole scenario but got it for 2 columns. To do it first of all, you need a unique identifier for each row. I am using a sequence number (1,2,3...).
Now refer to this answer, which uses recursive subquery to split csv to rows. Then I used XML PATH to change columns back to csv.
This is the query which is doing it for OLD SPC and OLD FREQ.
;with tmp(SEQ,OldSPCItem,OldSPC,OLD_FREQ_item,OLD_FREQ) as (
select SEQ, LEFT(OldSPC, CHARINDEX(',',OldSPC+',')-1),
STUFF(OldSPC, 1, CHARINDEX(',',OldSPC+','), ''),
LEFT(OLD_FREQ, CHARINDEX(',',OLD_FREQ+',')-1),
STUFF(OLD_FREQ, 1, CHARINDEX(',',OLD_FREQ+','), '')
from table1
union all
select SEQ, LEFT(OldSPC, CHARINDEX(',',OldSPC+',')-1),
STUFF(OldSPC, 1, CHARINDEX(',',OldSPC+','), ''),
LEFT(OLD_FREQ, CHARINDEX(',',OLD_FREQ+',')-1),
STUFF(OLD_FREQ, 1, CHARINDEX(',',OLD_FREQ+','), '')
from tmp
where OldSPC > ''
)
select seq,STUFF( (SELECT ',' + CONCAT(OldSPCItem,'/',OLD_FREQ_item) FROM TMP I
WHERE I.seq = O.seq FOR XML PATH('')),1,1,'') OLD_SPC_OLD_FREQ
from tmp O
GROUP BY seq
;
It will give you this output
+-----+------------------+
| seq | OLD_SPC_OLD_FREQ |
+-----+------------------+
| 1 | ADH/7,BAP/9 |
| 2 | NOT REQ/NOT REQ |
+-----+------------------+
What do you have to do now
- Find a way to generate a sequence number to uniquely identify each row. If you can use any column, use that instead of SEQ.
Similarly add logic for NEW_SPC and NEW_FREQ. (just copy paste LEFT and STUFF like in OLD_FREQ and change it for NEW_SPC and NEW_FREQ.
Replace multiple NOT REQ/ with '', so you will get only one NOT REQ. You can do it with replace function.
If you face any issue/error while doing so, add it to the Rexterster Demo and share the URL, we will check that.