Question

Query and Join question...

Asked by: MFredin

I have a complex (to me) query that I am building.  Here are my tables and fields I need to work with...

[loadboard]
originstateid, destinationstateid

[states]
stateid, regionid

[text]
outof, goingto

I will try to explain....
loadboard.originstateid & loadboard.destinationstateid corresponds to a states.stateid
Each unique states.stateid is assigned a states.regionid value
text.outof & text.goingto both contain a comma seperated list of values (1,2,3, etc) corresponding to states.regionid 's.


I need to find records from the text table where loadboard.originstateid's corresponding states.regionid is in the text.outof value list and the loadboard.destinationid's corresponding states.regionid is in the text.goingto value list.

How might I do this?  I hope I explained it ok to understand. thanks

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Asked On
2006-10-04 at 14:29:02ID22013287
Tags

query

Topic

ColdFusion Application Server

Participating Experts
2
Points
250
Comments
5

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Answers

 

by: danrosenthalPosted on 2006-10-04 at 16:15:12ID: 17664457

Consider changing your table structure before continuing.

Add another table to hold the individual comma seperated values as individual values in a new table.
For instance if you have values "1,4,23" in your outof field, instead enter them as 3 records of "1", "4", and "23" in a new table referenced by a unique id to the text table.

 

by: DanielSKimPosted on 2006-10-04 at 18:08:51ID: 17665019

what database system are you using?

 

by: MFredinPosted on 2006-10-04 at 18:17:53ID: 17665068

I am using MySql 4.

 

by: DanielSKimPosted on 2006-10-04 at 18:43:40ID: 17665196

this works in sql server. i'm not sure if it translates completely to mysql.

if this runs, you could then join the loadboard table on to it as a derived table or a temp table.

      SELECT
            text.outof,
            text.goingto,
            OutOfStates.regionid OutOfRegionId,
            OutOfStates.stateid OutOfStateId,
            GoingToStates.regionid GoingToRegionId,
            GoingToStates.stateid GoingToStateId
      FROM
            text
            INNER JOIN states AS OutOfStates
            ON
                  text.outof LIKE RTRIM(CAST(OutOfStates.regionid as char(10))) + ',%' OR
                  text.outof LIKE '%,' + RTRIM(CAST(OutOfStates.regionid as char(10))) + ',%' OR
                  text.outof LIKE '%,' + RTRIM(CAST(OutOfStates.regionid as char(10)))
            INNER JOIN states AS GoingToStates
            ON
                  text.goingto LIKE RTRIM(CAST(GoingToStates.regionid as char(10))) + ',%' OR
                  text.goingto LIKE '%,' + RTRIM(CAST(GoingToStates.regionid as char(10))) + ',%' OR
                  text.goingto LIKE '%,' + RTRIM(CAST(GoingToStates.regionid as char(10)))

20120131-EE-VQP-002

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