How to apply multiple or nested cursor and store data in temporary table in my sql?

Question

Table 1 : airport

Id airportname 
1  NYK(newyork)
2  DXB (dubai)
3  BOM (Bombay) 
4  DEL (delhi)

Now My Rote details

    First Last      Detail Route  
1 : Nyk - BOM : Nyk - DXB - BOM    
2 : Nyk - Del : Nyk - DXB - BOM -Del

Table 2 : segmentdetails

SegmentdetailsId    RouteId     Originairport     destibation airport  
1                     1          1                   2
2                     1          2                   3 
3                     1          3                   4
4                     2          1                   2
5                     2          2                   3

Note: user can journy any segment wise on route e.g. Nyk to DXB (1-2),Nyk - Bom(1 - 3) ,Nyk- Del (1- 4) or Dxb - Bom(2 - 4) etc..

Now my question is when I pass in parameter as origin airport ID : 1 and destination ID : 4 so my result would be come as below table in store procedure

CASE - 1 Temptable: routewise_segmentdetails

SegmentdetailsId    RouteId    
1                     1  
2                     1  
3                     1      

OR

Case - 2 I pass in parameter as origin airport ID : 1 and destination ID : 3 so my result would be come as below table

Temptable: routewise_segmentdetails

SegmentdetailsId    RouteId    
1                     1  
2                     1  

4                     2      
5                     2      

OR

Case - 3 I pass in parameter as origin airport ID : 2 and destination ID : 3 so my result would be come as below table

Temptable: routewise_segmentdetails

    SegmentdetailsId    RouteId    
    2                     1  
    5                     2  

might be I can use nested cursor then I get values but I have not idea about nested cursor with table.

Answer 1

Seeing as the structure of your table - and the way you store data means that segmentDetails are stored sequentially. Given that bit of info, you don't need to store any stuffs in temp tables or anything like that at all.

I think that this should do the trick - you just write two subqueries, each pulling a distinct routeId and joining it back to the original table as well as each other, but also constrain the outer query by the same params you use in the subqueries:

select
    core.segmentDetailsId,
    core.routeId
from
    segmentDetails core
        join (
            select distinct
                routeId
            from
                segmentDetails
            where
                originAirport=param1    
        ) sub1
        on core.routeId=sub1.routeId
        join (
            select distinct
                routeId
            from
                segmentDetails
            where
                destinationAirport=param2       
        ) sub2
        on core.routeId=sub2.routeId
        and sub1.routeId=sub2.routeId
where
    core.originAirport>=param1
    and core.destinationAirport<=param2
order by
    segmentDetailsId,
    routeId

Edit: I haven't actually tested this, but I think it is likely to work. If not, leave me a comment and I will have another look.

Edit 2: I think your case 2 is wrong based on what you seem to be asking:

Case ------- 2 I pass in parameter as origin airport ID : 1 and destination ID : 3 so my result would be come as below table

Temptable: routewise_segmentdetails

SegmentdetailsId    RouteId    
1                     1  
2                     1  
3??                   1??
4                     2      
5                     2    

You put destination as 3, yet you are showing SegDetId 3, which has an ORIGIN of 3, yet a destination of 4. I take it you meant to NOT show this row in your results?

Answer 2

Here is final sql which consider all posibilities

select SegmentdetailsId   , RouteId
from segmentdetails
where ORIGINAIRPORT >= 2 and DESTIBATIONAIRPORT<= 3

Answer 3

This will return your intended result set...You can try with creating two provided tables and run the following SQL which will definately return your intended result set:

select SegmentdetailsId,RouteId from segmentdetails
    where destinationairport<= "Your Number'