SQL Server 2008 Management Studio : convert row data into columns [duplicate] - sql

Question

This question already has answers here:
Transpose rows and columns with no aggregate
(2 answers)
Closed 8 years ago.
I have tried viewing other posts on the subject but all the examples I've seen are based on knowing a specific value.
Example of what I have:
Address Name Number
------- ------- -------
1234 Main Bob 555-555-5555
1234 Main Karen 444-444-4444
1990 Maple Susie 333-333-3333
1010 12th Joe 222-222-2222
1010 12th Beth 111-111-1111
1010 12th Steve 444-433-3221
Example of what I want:
Address Contact1 Contact2 Contact3
------- ------- -------- --------
1234 Main Bob:555-555-5555 Karen:444-444-4444 NULL
1990 Maple Susie:333-333-3333 NULL NULL
1010 12th Joe: 222-222-2222 Beth 111-111-1111 Steve 444-433-3221
There are thousands of rows so I can't CASE and.. I'm a more than a little lost here.
Any suggestions?

Answer 1

I think you can use the following query. This assumes you have maximum three contacts
;WITH orderedAddress(Address,Name,Number,Sort)
AS
(
SELECT Address,Name,Number,ROW_NUMBER() OVER(PARTITION BY Address ORDER BY Name) AS num
FROM Addresses
)
SELECT main.Address,Contact1.Name + ':' + Contact1.Number AS Contact1 ,
Contact2.Name + ':' + ISNULL(Contact2.Number,'') AS Contact2 ,
Contact3.Name + ':' + ISNULL(Contact3.Number,'') AS Contact3
FROM
(SELECT DISTINCT Address FROM Addresses) AS main
LEFT JOIN OrderedAddress Contact1 ON main.Address = Contact1.Address AND Contact1.Sort=1
LEFT JOIN OrderedAddress Contact2 ON main.Address = Contact2.Address AND Contact2.Sort=2
LEFT JOIN OrderedAddress Contact3 ON main.Address = Contact3.Address AND Contact3.Sort=3

Answer 2

A dynamic pivot will work but so will a dynamic cross tab. Generally speaking a cross tab will beat the pivot for performance. Here is an example of one I posted just a few days ago.
if OBJECT_ID('Something') is not null
drop table Something
create table Something
(
ID int,
Subject1 varchar(50)
)
insert Something
select 10868952, 'NUR/3110/D507' union all
select 10868952, 'NUR/3110/D512' union all
select 10868952, 'NUR/4010/D523' union all
select 10868952, 'NUR/4010/HD20' union all
select 12345, 'asdfasdf'
declare #MaxCols int
declare #StaticPortion nvarchar(2000) =
'with OrderedResults as
(
select *, ROW_NUMBER() over(partition by ID order by Subject1) as RowNum
from Something
)
select ID';
declare #DynamicPortion nvarchar(max) = '';
declare #FinalStaticPortion nvarchar(2000) = ' from OrderedResults Group by ID order by ID';
with E1(N) AS (select 1 from (values (1),(1),(1),(1),(1),(1),(1),(1),(1),(1))dt(n)),
E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows
E4(N) AS (SELECT 1 FROM E2 a, E2 b), --10E+4 or 10,000 rows max
cteTally(N) AS
(
SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E4
)
select #DynamicPortion = #DynamicPortion +
', MAX(Case when RowNum = ' + CAST(N as varchar(6)) + ' then Subject1 end) as Subject' + CAST(N as varchar(6)) + CHAR(10)
from cteTally t
where t.N <=
(
select top 1 Count(*)
from Something
group by ID
order by COUNT(*) desc
)
select #StaticPortion + #DynamicPortion + #FinalStaticPortion
declare #SqlToExecute nvarchar(max) = #StaticPortion + #DynamicPortion + #FinalStaticPortion;
exec sp_executesql #SqlToExecute