Return multiple values in one column - sql

Question

I have two tables
Employee:
Empid Ename Eage Eadd Ephone
1 x 23 b 677
2 y 24 h 809
3 z 34 u 799
Department:
Did fkEmpid dname ddescription
123 1 test test
234 1 test1 test1
667 2 hello hello
Finally I want something like this
Ename Eage Eadd Ephone dname
x 23 b 677 test,test1
y 24 h 809 hello
z 34 u 799 null
Please help me with the SQL

Answer 1

It certainly would be nice to know the target RDBMS. But this question is asked so often so let's try and list'em all (at least popular ones) side by side.
For SQL Server:
SELECT e.Ename, e.Eage, e.Eadd, e.Ephone, d.dname
FROM Employee e LEFT JOIN
(
SELECT fkEmpid,
STUFF((SELECT ',' + dname
FROM Department
WHERE fkEmpid = t.fkEmpid
FOR XML PATH('')) , 1 , 1 , '' ) dname
FROM Department t
GROUP BY fkEmpid
) d
ON e.Empid = d.fkEmpid
Here is SQLFiddle demo
For Mysql, SQLite, HSQLDB 2.X:
SELECT e.Ename, e.Eage, e.Eadd, e.Ephone, d.dname
FROM Employee e LEFT JOIN
(
SELECT fkEmpid,
GROUP_CONCAT(dname) dname
FROM Department t
GROUP BY fkEmpid
) d
ON e.Empid = d.fkEmpid
Here is SQLFiddle demo (MySql)
Here is SQLFiddle demo (SQLite)
For Oracle 11g:
SELECT e.Ename, e.Eage, e.Eadd, e.Ephone, d.dname
FROM Employee e LEFT JOIN
(
SELECT fkEmpid,
LISTAGG (dname, ',') WITHIN GROUP (ORDER BY dname) dname
FROM Department t
GROUP BY fkEmpid
) d
ON e.Empid = d.fkEmpid
Here is SQLFiddle demo
For PostgreSQL 9.X:
SELECT e.Ename, e.Eage, e.Eadd, e.Ephone, d.dname
FROM Employee e LEFT JOIN
(
SELECT fkEmpid,
string_agg(dname, ',') dname
FROM Department t
GROUP BY fkEmpid
) d
ON e.Empid = d.fkEmpid
Here is SQLFiddle demo
Output in all cases:
| ENAME | EAGE | EADD | EPHONE | DNAME |
---------------------------------------------
| x | 23 | b | 677 | test,test1 |
| y | 24 | h | 809 | hello |
| z | 34 | u | 799 | (null) |

Answer 2

Considering RDBMS as SQL SERVER 2008
select E.Ename,E.Eage,E.Eadd,E.Ephone,D.dname
into Table1
from Employee E
left join Deparment D on E.Empid=D.fkEmpid
select t1.[Ename], t1.[Eage], t1.[Eadd], t1.[Ephone],
STUFF((
SELECT ', ' + t2.dname
FROM Table1 t2
WHERE t2.Ename = t1.Ename
AND t2.Eage=t1.Eage
AND t2.Eadd=t1.Eadd
AND t2.Ephone=t1.Ephone
FOR XML PATH (''))
,1,2,'') AS Names
FROM Table1 t1
GROUP BY t1.Ename,t1.[Eage], t1.[Eadd], t1.[Ephone];
SQL FIDDLE