Question

I have two table employee table and employee dependency table.
Employee tooks like below.

insert into E values(1,'Adam')
insert into E values(2,'Bob')
insert into E values(3,'Candy')
insert into E values(4,'Doug')
insert into E values(5,'Earl')
insert into E values(6,'Fran')

Employee dependency table looks like below

insert into Ed values(3,'2')
insert into Ed values(3,'5')
insert into Ed values(2,'1')
insert into Ed values(2,'4')
insert into Ed values(5,'6')

I need to find the dependency list like below

Eid  Ename     Dname
3     Candy    Bob,Fran

Please help me finding the above.

Answer 1

Setup:

create table E(id int , name varchar(100))

insert into E values(1,'Adam')
insert into E values(2,'Bob')
insert into E values(3,'Candy')
insert into E values(4,'Doug')
insert into E values(5,'Earl')
insert into E values(6,'Fran')

create table Ed(id1 int, id2 int)

insert into Ed values(3,2) 
insert into Ed values(3,5)
insert into Ed values(2,1)
insert into Ed values(2,4)
insert into Ed values(5,6)

Query:

select Name,
    stuff((select ',' + e1.name
    from Ed
        join E e1 on
            Ed.id2 = e1.id
    where Ed.id1 = E.id
    for xml path('')), 1, 1, '') as Dependents
from E

Result:

Name       Dependents
---------- --------------
Adam       NULL
Bob        Adam,Doug
Candy      Bob,Earl
Doug       NULL
Earl       Fran
Fran       NULL

If you need to show only those that have dependents:

select *
from
(
    select Name,
        stuff((select ',' + e1.name
        from Ed
            join E e1 on
                Ed.id2 = e1.id
        where Ed.id1 = E.id
        for xml path('')), 1, 1, '') as Dependents
    from E
) tt
where Dependents is not null