Syntax to group data in a certain order

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Syntax to group data in a certain order

Author

Topic

froggy
Starting Member

14 Posts

Posted - 2006-10-23 : 05:37:24

Hi,

i would like to return information in the below format but not very sure how it is to be done.

Role, Name, ID, Contact Number
Z, Mary, 05, 1234567
, Matt, 02, 2233445
A, Bob, 10, 7654321
C, Tammy, 11, 9988776

and the order of Role (Z,A,C) is fixed it has to be in this order and if Role Z has more than one person, it will return only the name, id and contact number but will not repeat the role.

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2006-10-23 : 05:48:10

You can easily change order by id to order by name, and in the sub query. The drawback with using names, is the likelyness of duplicates.
I hope ID is unique in your example.

declare @test table (Role varchar, Name varchar(10), ID varchar(2), ContactNumber varchar(20))

insert	@test
select	'A', 'Bob', '10', '7654321' UNION ALL
select	'Z', 'Matt', '02', '2233445' UNION ALL
select	'C', 'Tammy', '11', '9988776' UNION ALL
select	'Z', 'Mary', '05', '1234567'

select		case when (select count(*) from @test x where x.role = t.role and x.id < t.id) > 0 THEN NULL ELSE t.Role END Role,
		t.name,
		t.id,
		t.contactnumber
from		@test t
order by	case
			when t.role = 'a' then 2
			when t.role = 'c' then 3
			when t.role = 'z' then 1
			else 32767
		end,
		t.id