Re: Complex Query - Data from 3 tables simultaneously - Mailing list pgsql-sql
| From | |
|---|---|
| Subject | Re: Complex Query - Data from 3 tables simultaneously |
| Date | |
| Msg-id | 4538E1203665624F97A8494BCF2716E5F4875B@blrx2kmbgl102.blr.amer.dell.com Whole thread Raw |
| In response to | Complex Query - Data from 3 tables simultaneously (<Amit_Wadhwa@Dell.com>) |
| List | pgsql-sql |
SELECT a.*,b.*,c.*,c.issuedate-a.recd_date as age FROM shipments a LEFT JOIN materials b ON a.shipid = b.shipid;
LEFT JOIN issuetable c ON b.material_id = c.material_id
LEFT JOIN issuetable c ON b.material_id = c.material_id
WHERE (a.recd_date between cast(' "+date1+" 00:00:00' as datetime) and cast(' "+date2 + ' ") 23:59:59' as datetime)
Did the above, got the expected results, did not specify 'Outer Join' only specified Join, is that a problem?
From: Muralidharan Ramakrishnan [mailto:contact2muraliin@yahoo.co.in]
Sent: Friday, October 28, 2005 10:41 PM
To: Wadhwa, Amit; pgsql-sql@postgresql.org
Subject: Re: [SQL] Complex Query - Data from 3 tables simultaneously
SELECT A.SID , A.RECDATE , B.MID , B.MBDATE , C.ISSDATE FROM TableA A LEFT OUTER JOIN TableB B ON A.SID = B.SID
LEFT OUTER JOIN TableC C ON B.MID = C.MID
ORDER BY A.SID
Amit_Wadhwa@Dell.com wrote:
LEFT OUTER JOIN TableC C ON B.MID = C.MID
ORDER BY A.SID
Amit_Wadhwa@Dell.com wrote:
All,
Using Postgres 8.0 on Windows Server 2003 - 16GB Ram, 3Ghz X 2 Xeons
Accessing through JDBC / JSP
I have 3 shipment tables.
Table A - Records arrived Shipments.
Table B - Records Materials (maybe more than one per shipment) in the shipment.
Table C - Records Issuances of material (maybe more than one Issuance per line item of material) in Table B.
eg.
Table A (PK = Shipment ID)
-----------
shipment ID Recd Date
1 2005-XX-XX
10 2005-XX-XX
Table B (PK = Material ID, FK = Shipment ID, references Table A (shipment ID))
-----------------
shipment ID Material ID Material Bond Date
10 1 2005-XX-XX
10 2 2005-XX-XX
Table C (PK = Issue ID, FK = Material ID, references Table B (Material ID))
----------------
Material ID Issue ID Issue Date
1 1 2005-05-XX
1 2 2005-05-XX
I want to get data (under criteria of recvd date in table A) the following records:
shipment ID Recd Date MaterialID Bond Date Issue ID Issue Date
1 2005-XX-XX - - - -
10 2005-XX-XX 1 2005-XX-XX 1 2005-05-XX
10 2005-XX-XX 1 2005-XX-XX 2 2005-05-XX
10 2005-XX-XX 2 2005-XX-XX - -
Basically I want a raw dump of data
- Should have all the shipments regardless of whether they have any material items entered or not
- Should have all Material Items for Every Shipment regardless of whether it was issued or not.
I know I need an outer join (Do I Not?), but am confused as to how to implement it.
Because this seems to be a requirement of a reversed outer join (??)
Please assist,
Thanks in advance.
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