Question

I have table in SQL Server 2005 that contains two columns Fruit and Colour as shown below

Fruit          Colour
Apple          Red
Orange         Red
Berry          Green
PineApple      Green

Now i want to convert it into an adjacency matrix query
as shown below

                Red        Green
Apple           1          0
Orange          1          0
Berry           0          1
PineApple       0          1

what i want to do is give 1 if Fruit and Colour are there
else i want to give a 0

Answer 1

It was hard to avoid those null values in the pivot.

declare @t table (fruit varchar(10), colour varchar(10))

insert @t
select 'Apple',     'Red'   union all
select 'Orange',    'Red'   union all
select 'Berry',     'Green' union all
select 'PineApple', 'Green'

select * from (
select a.fruit, b.colour, case when c.fruit is null then 0 else 1 end found from 
(select distinct fruit, colour from @t) a
cross join 
(select distinct colour from @t) b
left outer join 
(select distinct fruit, colour from @t) c
on a.fruit = c.fruit and b.colour = c.colour) d
PIVOT
(max(found)  
FOR colour
in([red],[green])  
)AS p
order by 3, 1   

Output

fruit      red         green
---------- ----------- -----------
Apple      1           0
Orange     1           0
Berry      0           1
PineApple  0           1