Return Table from SQL Query - sql

Question

I have 3 tables in an SQL Server 2008 database. The first table contains users names, the second contains privileges and the last links the first two tables:
USERS (ID integer, NAME varchar(20));
PRIVS (ID integer, NAME varchar(50));
USERS_PRIVS (USERID integer, PRIVID integer);
For example, the USERS table has the following:
1, Adam
2, Benjamin
3, Chris
The PRIVS table has:
1, Add Invoice
2, Edit Invoice
3, Delete Invoice
The USERS_PRIVS table has:
1, 1
1, 2
1, 3
2, 1
2, 2
3, 1
I am looking for a way to create an SQL query that would return something like the following:
Add Invoice Edit Invoice Delete Invoice
Adam Y Y Y
Benjamin Y Y N
Chris Y N N
Is this possible using the pivot function?

Answer 1

SELECT Name, [Add Invoice],[Edit Invoice],[Delete Invoice] FROM
(SELECT U.Name AS Name, P.Name AS PrivName FROM USERS_PRIVS UP
INNER JOIN Users U ON UP.UserID = U.id
INNER JOIN Privs P ON UP.PrivID = P.id) SB
PIVOT(
count(SB.PrivName)
FOR SB.PrivName in ([Add Invoice],[edit Invoice],[Delete Invoice])) AS Results
EDIT 1:
You will have to use some dynamic sql then.
DECLARE #query AS NVARCHAR(MAX);
DECLARE #privColumnNames AS NVARCHAR(MAX);
select #privColumnNames = STUFF((SELECT distinct ',' + QUOTENAME(Name)
FROM PRIVS FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)'), 1, 1, '');
SELECT #query =
'SELECT *
FROM
(SELECT U.Name AS Name, P.Name AS PrivName FROM USERS_PRIVS UP
INNER JOIN Users U ON UP.UserID = U.id
INNER JOIN Privs P ON UP.PrivID = P.id) SB
PIVOT(
count(SB.PrivName)
FOR SB.PrivName in ( ' + #privColumnNames + ' )) AS Results ';
execute(#query);
I borrowed the XML stuff from here Dynamic Pivot Columns in SQL Server

Answer 2

Try this:
select
name,
CASE [1] WHEN 1 THEN 'Y' ELSE 'N' END as 'Add Invoice',
CASE [2] WHEN 1 THEN 'Y' ELSE 'N' END as 'Edit Invoice',
CASE [3] WHEN 1 THEN 'Y' ELSE 'N' END as 'Delete Invoice'
from
(select name, userId, privid, 1 temp from users_privs join users on id = userid) as sourceTable
pivot( min(temp) for privid in ([1], [2], [3])) as pivotTable

Answer 3

Here's a Demo on SqlFiddle.
with cl
as (
select u.NAME , case when p.ID = 1 then 'Y' else 'N' end 'Add Invoice',
case when p.ID = 2 then 'Y' else 'N' end 'Edit Invoice',
case when p.ID = 3 then 'Y' else 'N' end 'Delete Invoice'
from USERS u inner join USERS_PRIVS up on u.ID = up.USERID
inner join PRIVS p on up.PRIVID = p.ID
)
select NAME, MAX([Add Invoice]) 'Add Invoice',
MAX([Edit Invoice]) 'Edit Invoice',
MAX([Delete Invoice]) 'elete Invoice'
from cl
group by NAME
Here's a Demo on SqlFiddle.
select NAME , case when [Add Invoice] = 1 then 'Y' else 'N' end 'Add Invoice',
case when [Edit Invoice] = 1 then 'Y' else 'N' end 'Edit Invoice',
case when [Delete Invoice] = 1 then 'Y' else 'N' end 'Delete Invoice'
from (
select u.NAME, p.NAME as pname
from USERS u inner join USERS_PRIVS up on u.ID = up.USERID
inner join PRIVS p on up.PRIVID = p.ID
) p
pivot( count(pname) for pname in ([Add Invoice], [Edit Invoice], [Delete Invoice])) as pvt