Question

I’d like to create a SQL Server select statement where the cross referenced data are in one column from different rows. I’d like to use stuff (if possible) and no ;with command.

Contract table

ID  Subject
1   a
2   b
3   c

Company table

ID  Name
1   a_ltd
2   b_ltd
3   c_ltd
4   d_ltd
5   e_ltd

ContractContractorCrossRef table (junction table)

ID  ContractID_ CompanyID_
1   1               1
2   1               2
3   2               3
4   3               1
5   3               4
6   3               5

I’d like this result:

Contract.ID company.Name
1           a_ltd, b_ltd
2           c_ltd
3           a_ltd, d_ltd, e_ltd

Populate data:

create table #Contract (ID INT, Subject VARCHAR(1))
INSERT  #Contract
SELECT  1, 'a' UNION ALL
SELECT  2, 'b' UNION ALL
SELECT  3, 'c'

create table #Company (ID INT, Name VARCHAR(5))
INSERT  #Company
SELECT  1, 'a_ltd' UNION ALL
SELECT  2, 'b_ltd' UNION ALL
SELECT  3, 'c_ltd' UNION ALL
SELECT  4, 'd_ltd' UNION ALL
SELECT  5, 'e_ltd'

create table #ccRef (ID INT, ContractID_ INT, CompanyID_ INT)
INSERT  #ccRef
SELECT  1, 1, 1 UNION ALL
SELECT  2, 1, 2 UNION ALL
SELECT  3, 2, 3 UNION ALL
SELECT  4, 3, 1 UNION ALL
SELECT  5, 3, 4 UNION ALL
SELECT  6, 3, 5 

Select:

select #Contract.ID, #Company.Name from #Contract
inner join #ccRef on #Contract.ID = #ccRef.ContractID_ inner join #Company
on #ccRef.CompanyID_ = #Company.ID

Select result: (not wanted)

ID  Name
1   a_ltd
1   b_ltd
2   c_ltd
3   a_ltd
3   d_ltd
3   e_ltd

Requested result:

Contract.ID company.Name
1           a_ltd, b_ltd
2           c_ltd
3           a_ltd, d_ltd, e_ltd

Answer 1

Try this. I have not tested the code as i do not have ddl for these tables.But it should work..

       SELECT ct.id ,
 left(companyname.value('.','varchar(max)'), len(companyname.value('.','varchar(max)'))-1) as companyname 
from 
    contract ct 
    cross apply 
    ( 
    select cm.name + ',' [text()]
    from 
    contractcompanycrossref cc 

    inner join company cm
    on cc.companyid = cm.ID
      where ct.id = cc.contractid 
    for xml path (''),type
    ) cmnames(companyname)