Solved

Need help in framing a SQL query

Posted on 2008-10-23
9
299 Views
Last Modified: 2012-05-05
Got an External View View1 and a Table A in my DB


Column details of View 1
ID1, ID2

Column details of Table A column
ID
System ID
Reconciliation ID
Instance ID

Required Result
ID1, System ID1, Reconciliation ID1, Instance ID1, ID2, System ID2, Reconciliation ID2, Instance ID2

Note:  ID1 OR  ID2 refers to ID in table A.

Let me know if you need any clarifications
0
Comment
Question by:tks_g100
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
9 Comments
 
LVL 60

Accepted Solution

by:
Kevin Cross earned 350 total points
ID: 22789555
Something like this should work.
SELECT v.ID1
, s1.[System ID1]
, s1.[Reconciliation ID1]
, s1.[Instance ID1]
, v.ID2
, s2.[System ID1] AS [System ID2]
, s2.[Reconciliation ID1] AS [Reconciliation ID2]
, s2.[Instance ID1] AS [Instance ID2]
FROM View1 v
LEFT JOIN TableA s1 ON s1.ID = v.ID1
LEFT JOIN TableA s2 ON s2.ID = v.ID2

Open in new window

0
 
LVL 18

Expert Comment

by:UnifiedIS
ID: 22789567
SELECT V.ID1, A.systemID, A.ReconciliationID, A.InstanceID,
      V.ID2, V.SystemID, V.ReconciliationID, V.InstanceID
FROM View1 V
LEFT OUTER JOIN TableA A
      ON A.ID = V.ID1
LEFT OUTER JOIN TableA B
      ON B.ID = V.ID2
0
 
LVL 60

Expert Comment

by:Kevin Cross
ID: 22789585
If you only want records where both the ID1 and ID2 values exist, then change query to use INNER JOIN versus LEFT JOIN.  As structured above, you will get where ID1 exists and ID2 doesn't and vice versus as well as where neither exist.

If you like the LEFT JOIN to get one or the other, but don't want to see where neither exists, you can add a where clause like:

WHERE COALESCE(s1.[System ID1], s2.[System ID1]) IS NOT NULL;
0
Get Actionable Data from Your Monitoring Solution

Your communication platform is only as good as the relevance of the information you send. Ensure your alerts get to the right people every time with actionable responses. Create escalation rules that ensure everyone follows the process and nothing is left to chance.

 
LVL 16

Expert Comment

by:Sheils
ID: 22789595
where does System ID2, Reconciliation ID2, Instance ID2 come from
0
 
LVL 60

Expert Comment

by:Kevin Cross
ID: 22789608
And sorry, I just relooked and your fields are ID not ID1.
SELECT v.ID1
, s1.[System ID] AS [System ID1]
, s1.[Reconciliation ID] AS [Reconciliation ID1]
, s1.[Instance ID] AS [Instance ID1]
, v.ID2
, s2.[System ID] AS [System ID2]
, s2.[Reconciliation ID] AS [Reconciliation ID2]
, s2.[Instance ID] AS [Instance ID2]
FROM View1 v
LEFT JOIN TableA s1 ON s1.ID = v.ID1
LEFT JOIN TableA s2 ON s2.ID = v.ID2

Open in new window

0
 
LVL 3

Expert Comment

by:richard_crist
ID: 22789609
Clarification:

*  You have two columns in View 1 called ID1 and ID2
*  You have Table A with four columns where the first column ID can have a value equal to the value in View 1 in either ID1 or ID2, that is, for a given row in Table A its first column ID could match a row in View 1 if the Table A ID equals either ID1 or ID2 in View 1
*  You wish to output rows showing ID1 from View 1 followed by the matching System, Reconciliation, and Instance IDs from Table A and on the same output row show ID2 from View 1 followed by the matching System, Reconciliation, and Instance IDs from Table A

Is that correct?
0
 
LVL 60

Expert Comment

by:Kevin Cross
ID: 22789624
That was a type-o on my part. Those should be aliases to identify which one of the TableA the data came from (i.e. which ID are they matching to ID1 or ID2).
0
 
LVL 60

Expert Comment

by:Kevin Cross
ID: 22789641
The WHERE clause suggestion above would likewise be changed to this:
WHERE COALESCE(s1.[System ID], s2.[System ID]) IS NOT NULL;

Hope all that helps...
0
 

Author Closing Comment

by:tks_g100
ID: 31509404
Fantastic response between here is my modified query to you. Let me know your suggestions

SELECT v. id_1
, s1.assetid AS assetid1
, s1.reconciliationidentity AS reconciliationidentityID1
, s1.instanceid AS instanceid1
, s1.datasetid AS datasetid1
, s1.classid AS classid1
, s1.name AS SysID1

, v. id_2
, s2.assetid AS assetid2
, s2.reconciliationidentity AS reconciliationidentityID2
, s2.instanceid AS instanceid2
, s2.datasetid AS datasetid2
, s2.classid AS classid2
, s2.name AS name2

FROM (select id_1, id_2 from aradmin.shr_association@testdb where id_1 is not NULL and id_2 is not NULL and status = 0 and id_1 like 'AST%' and id_2 like 'AST%') v
LEFT JOIN bmc_core_bmc_baseelement s1 ON substr(s1.assetid, 4) = substr(v.id_1, 4)
LEFT JOIN bmc_core_bmc_baseelement s2 ON substr(s2.assetid, 4) = substr(v.id_2, 4)
0

Featured Post

Enroll in June's Course of the Month

June's Course of the Month is now available! Every 10 seconds, a consumer gets hit with ransomware. Refresh your knowledge of ransomware best practices by enrolling in this month's complimentary course for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

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

'Between' is such a common word we rarely think about it but in SQL it has a very specific definition we should be aware of. While most database vendors will have their own unique phrases to describe it (see references at end) the concept in common …
Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.

695 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