Write non-Pivot version of a query - sql-server-2005

Question

Here is my table structure and some data:
CREATE TABLE Travel
(
ID int primary key,
Name nvarchar(25),
City nvarchar(25),
Month varchar(3)
)
INSERT INTO Travel
(ID, Name, City, Month)
VALUES
(1, 'Name1', 'Paris','Jan'),
(2, 'Name1', 'Rome','Feb'),
(3, 'Name2', 'Italy','Jan'),
(4, 'Name2', 'Rome','Feb'),
(5, 'Name3', 'Los Angeles','Jan'),
(6, 'Name3', 'New York','Feb');
Can someone please help me write out the non-Pivot version to return the 'month' columns only when there is data (Assume the database is before SQL Server 2005).
Here is a sample query but it returns NULL data columns (Apr, May)
SELECT Name,
max(CASE WHEN MONTH = 'Jan' THEN City END) Jan,
max(CASE WHEN MONTH = 'Feb' THEN City END) Feb,
max(CASE WHEN MONTH = 'Mar' THEN City END) Mar,
max(CASE WHEN MONTH = 'Apr' THEN City END) Apr,
max(CASE WHEN MONTH = 'May' THEN City END) May
FROM Travel
GROUP BY Name
NAME JAN FEB MAR APR MAY
Name1 Paris Rome (null) (null) (null)
Name2 Italy Rome (null) (null) (null)
Name3 Los Angeles New York (null) (null) (null)
Also, what would be the PIVOT version of the query, as there is no function to aggregate the column over?

Answer 1

You can easily do something like this:
DECLARE
#v_sql varchar(8000)
BEGIN
Set #v_sql = 'SELECT name '
If exists (select month FROM travel WHERE month='Jan')
BEGIN
Set #v_sql = #v_sql + ', max(CASE WHEN MONTH = ''Jan'' THEN City END) Jan'
End
If exists (select month FROM travel WHERE month='Feb')
BEGIN
Set #v_sql = #v_sql + ', max(CASE WHEN MONTH = ''Feb'' THEN City END) Feb'
End
If exists (select month FROM travel WHERE month='Mar')
BEGIN
Set #v_sql = #v_sql + ', max(CASE WHEN MONTH = ''Mar'' THEN City END) Mar'
End
If exists (select month FROM travel WHERE month='Apr')
BEGIN
Set #v_sql = #v_sql + ', max(CASE WHEN MONTH = ''Apr'' THEN City END) Apr'
End
If exists (select month FROM travel WHERE month='May')
BEGIN
Set #v_sql = #v_sql + ', max(CASE WHEN MONTH = ''May'' THEN City END) May'
End
Set #v_sql = #v_sql + ' FROM Travel GROUP BY name'
EXECUTE(#v_sql)
END
Output:
NAME JAN FEB
-------- ------------- -----------
Name1 Paris Rome
Name2 Italy Rome
Name3 Los Angeles New York
Don't forget to check the Fiddle demo