Solved

SQL Query help required

Posted on 2011-09-08
6
235 Views
Last Modified: 2012-05-12
Hi

I'm trying to return data from a SQL Server databae using the following query:

SELECT id,thing1,ISNULL(Monitor, 0) AS Monitor
FROM Things as t  
LEFT OUTER JOIN ThingRelationships as t  
ON t.ID=t.ChildDeviceID  
WHERE t.AccountID =1
AND r.ParentDeviceID= (27)

Where I want all the things with the account Id of 1 to be returned whether there is a record in the ThingRelationships table or not, with a ParentDeviceID=27.

I'd expect the following, for example.

id    thing1            Monitor
12   something     0
23   something     0
34   something     0
56   something     0
2     something     0
4     something     0
56   something     0
43   something     1

as 43 is currently the only one with a relationship.

Thanks in advance!


0
Comment
Question by:Spike_66
6 Comments
 
LVL 5

Accepted Solution

by:
zvytas earned 500 total points
ID: 36501909
Try the following:

SELECT id,thing1,ISNULL(Monitor, 0) AS Monitor
FROM Things as t  left JOIN ThingRelationships as r ON t.ID=r.ChildDeviceID AND r.ParentDeviceID= (27)
WHERE t.AccountID =1
0
 
LVL 18

Expert Comment

by:deighton
ID: 36501964
you seem mixed up as to what t and r are, there seems to be 2 t's defined, but no r

try something like

SELECT id,thing1,ISNULL(Monitor, 0) AS Monitor
FROM Things as t  
LEFT OUTER JOIN ThingRelationships as r  
ON r.ID=t.ChildDeviceID  
WHERE t.AccountID =1
AND COALESCE(r.ParentDeviceID,27) = 27
0
 
LVL 9

Expert Comment

by:mimran18
ID: 36501985
Hi,
   Both the table is alias as "t". You need to change "Things as t  " or "ThingRelationships as t "
to as "r"
 
SELECT id,thing1,ISNULL(Monitor, 0) AS Monitor
FROM Things as t
LEFT OUTER JOIN ThingRelationships as rON t.ID=r.ChildDeviceID  
WHERE t.AccountID =1
AND r.ParentDeviceID= (27)
0
Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

 

Author Closing Comment

by:Spike_66
ID: 36502020
Easy when you know how!
0
 

Author Comment

by:Spike_66
ID: 36502091
Not that it matters now but

"...Things as t
LEFT OUTER JOIN ThingRelationships as r..."

both tables aren't define as t
0
 

Author Comment

by:Spike_66
ID: 36502102
Oops- sorry - you were right- both were t- my bad!
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
Slowly Changing Dimension Transformation component in data task flow is very useful for us to manage and control how data changes in SSIS.
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed
Via a live example, show how to set up a backup for SQL Server using a Maintenance Plan and how to schedule the job into SQL Server Agent.

912 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now