| Subject: | Combining two tables MYSQL |
|---|---|
| From: | "Mi-ul" <webforumsuser@xxxxxxxxxxxxxx> |
| Date: | Thu, 31 Jul 2008 12:50:13 +0000 (UTC) |
| Newsgroups: | macromedia.coldfusion.database_access |
Hi
I'm struggling here. This isn't as straightforward as it looks at first glance.
I've got two tables - one for assets and one for actions performed on those
assets. I'm trying to create a report that shows each asset and then the most
recent action of type V and also the most recent action of type E.
(actually the asset table is 6 tables linked together to transform ID codes to
descriptive text)
(Note any typos below are from simplifying the actual code the page does work
but very slowly - as you'd expect)
table 1: asset
assetID - primary key e.g. XX12345
assetDescription
assetLocation
table 2: assetAction
assetActionID - primary key, autoinc (using this for most recent)
assetActionAssetID - asset table's assetID
assetActionType - e.g. E, V or other things I'm not interested in at this point
assetActionResult
Currently I'm doing it a very horrible way but It got it to where I needed it
to in the right timescale:
<cfquery name="assetList">SELECT * FROM asset ORDER BY assetID </cfquery>
<cfoutput query="assetList">
<tr>#assetList details#</tr>
<cfquery = "assetActionE" maxRows = "1">
SELECT * FROM assetAction
WHERE assetActionAssetID = #asset.assetID# AND assetAction = 'E'
ORDER BY assetActionID desc
</cfquery>
<tr>#assetActionE details#</tr>
<cfquery = "assetActionV" maxRows = "1">
SELECT * FROM assetAction
WHERE assetActionAssetID = #asset.assetID# AND assetAction = 'V'
ORDER BY assetActionID desc
</cfquery>
<tr>#assetActionV details#</tr>
</cfoutput>
My problem is combining the queries without creating a working table that has
each asset listed for each different action. I can't find a way currently to
combine the asset with just the two records from the assetAction table.
Please let me know which bits of this I haven't explained properly and I look
forward to any suggested solutions
Michael
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