SQL Query To Detect Non-existence Of Certain Records

Here is my query:

SELECT dnn_Roles.RoleName, xyzUser.FirstName, xyzUser.LastName, xyzUser.Email, xyzRewardPoint.Points, xyzRewardPoint.RewardID
FROM xyzRewardPoint INNER JOIN
xyzUser ON xyzRewardPoint.UserID = xyzUser.UserId INNER JOIN
dnn_UserRoles INNER JOIN
dnn_Roles ON dnn_UserRoles.RoleID = dnn_Roles.RoleID ON xyzUser.ProviderId = dnn_UserRoles.UserID
WHERE (dnn_UserRoles.RoleID = 3) OR
(dnn_UserRoles.RoleID = 4) OR
(dnn_UserRoles.RoleID = 6)
ORDER BY dnn_UserRoles.RoleID

What I need is to extend this query to detect any users who exist in dnn_UserRoles.RoleID 3, 4 or 6 but do not have a RewardID value of '43' in the xyzRewardPoint table.

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use tempdb
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[#xxx]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[#xxx]




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This function, F_TEMP_TABLE_EXISTS, checks for the existence of a temp table (## name or # name), and returns a 1 if it exists, and returns a 0 if it doesn't exist.

The script creates the function and tests it. The expected test results are also included.

This was tested with SQL 2000 only.

if objectproperty(object_id('dbo.F_TEMP_TABLE_EXISTS'),'IsScalarFunction') = 1
begin drop function dbo.F_TEMP_TABLE_EXISTS end
create function dbo.F_TEMP_TABLE_EXISTS
( @temp_table_name sysname )
returns int

Checks for the existence of a temp table
(## name or # name), and returns a 1 if
it exists, and returns a 0 if it doesn't exist.


if exists (
select *
tempdb.dbo.sysobjects o
o.xtype in ('U')and
o.id = object_id( N'tempdb..'+@temp_table_name )
begin return 1 end

return 0

print 'Create temp tables for testing'
create table #temp (x int)
create table ##temp2 (x int)
print 'Test if temp tables exist'

[Table Exists] = dbo.F_TEMP_TABLE_EXISTS ( NM ),
[Table Name] = NM
select nm = '#temp' union all
select nm = '##temp2' union all
select nm = '##temp' union all
select nm = '#temp2'
) a

print 'Check if table #temp exists'

if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1
print '#temp exists'
print '#temp does not exist'

print 'Check if table ##temp4 exists'
if dbo.F_TEMP_TABLE_EXISTS ( '##temp4' ) = 1
print '##temp4 exists'
print '##temp4 does not exist'

-- Drop temp tables used for testing,
-- after using function F_TEMP_TABLE_EXISTS
-- to check if they exist.

if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1
print 'drop table #temp'
drop table #temp

if dbo.F_TEMP_TABLE_EXISTS ( '##temp2' ) = 1
print 'drop table ##temp2'
drop table ##temp2

Test Results:

Create temp tables for testing
Test if temp tables exist
Table Exists Table Name
------------ ----------
1 #temp
1 ##temp2
0 ##temp
0 #temp2

(4 row(s) affected)

Check if table #temp exists
#temp exists
Check if table ##temp4 exists
##temp4 does not exist
drop table #temp
drop table ##temp2


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Not played with SQL for a while and am a bit rusty so please excuse me if I sound like a demented idiot! )

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