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Oracle Query Help

Posted on 2014-03-12
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Last Modified: 2014-03-12
I have a query below...each table has the common element of Document_id, however the LINE_ITEMS_TABLE can have multiple rows in it.  As such my results set is coming back larger than expected.  How can have the query just pull one row from the LINE_ITEMS_TABLE?

SELECT <LIST Of VALUES>
FROM WORKFLOW_TABLE A,
  HEADER_TABLE B,
  LINE_ITEMS_TABLE C
WHERE A.QUEUE = 1
AND A.USER = 'MSMITH'
AND B.ORGID     = '123'
AND A.DOCUMENT_ID = B.DOCUMENT_ID
AND C.COMPANY    = '01'
AND C.DOCUMENT_ID  = A.DOCUMENT_ID
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Question by:jmpatton
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David earned 500 total points
ID: 39924435
try adding AND ROWNUM = 1
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Author Comment

by:jmpatton
ID: 39924456
I tried that and it only returned 1 row over all.  What I currently have in the data base is a row in the header table, a row in the workflow table, and then two rows in the line_items_table.

When I join them all up like below, it returns two records because there are two records in the line items table.  In a live setting there will be hundreds of header records each with a corresponding workflow record and multiple line items for each.

SELECT A.INVOICE_NUMBER, B.WORKFLOW_QUEUE, C.COMPANY FROM WORKFLOW_TABLE A,
  HEADER_TABLE B,
  LINE_ITEMS_TABLE C
WHERE A.QUEUE = 1
AND A.USER = 'MSMITH'
AND B.ORGID     = '123'
AND A.DOCUMENT_ID = B.DOCUMENT_ID
AND C.COMPANY    = '01'
AND C.DOCUMENT_ID  = A.DOCUMENT_ID
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Author Comment

by:jmpatton
ID: 39924499
I think I figured it out.  The document id in the header table was duplicated.

Thanks for your help
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LVL 23

Expert Comment

by:David
ID: 39924630
Best kind of solution, where there is effort and learning.  You're welcome.
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