Selection of a specific record from a query


I have been using a certain set of code to query a database for a Recordset:


< CFQUERY NAME = "RandPick" DATASOURCE = "MyDB" >
SELECT ID
FROM MyTable
< / cfquery >


Then, I select randomly 1 number within this number of records:


< CFSET RND_PICK = plageAleatoire (1, #RandPick.RecordCount #) >


Finally, I use STARTROWOPTIONAL to display a field from the selected randomly record (what am I on a flash file):


MyFile.swf? ID = < CFOUTPUT QUERY = "RandPick" StartRowOptional = "" #RND_PICK # "LIGNESMAX ="1"> #PickID # < / CFOUTPUT >"


The final output might look like this:


MyFile.swf? ID = 46


This all works fine, but now I want to do something a little more complicated: I want to take this field value I found (in this case '46') and I want to ask a second table that contains detailed information about ID 46:

< CFQUERY NAME = "DetailedPickInfo" DATASOURCE = "MyDB" >
SELECT ID, PickDescription
OF MySecondTable
Where ID = ' 46 "
< / cfquery >


My problem is that I can't use my STARTROWOPTIONAL trick to incorporate the ID selected in my second request:

< CFQUERY NAME = "DetailedPickInfo" DATASOURCE = "MyDB" >
SELECT ID, PickDescription
OF MySecondTable
Where ID = < CFOUTPUT QUERY = "RandPick" StartRowOptional = "" #RND_PICK # "LIGNESMAX ="1"> ' #PickID # ' < / CFOUTPUT >"
< / cfquery >

Of course, which is not allowed.

Could someone smart please help me find a way to do this?


Basically, I'm trying to select a random record from a query and then JOIN the selected record with a second table (where I want to grab a piece of data).

I understand that my STARTROWOPTIONAL method is a bit of a hack, and there is probably a better way to achieve all this.

Any help would be appreciated.



On a related note, I would also like to know a general solution for the selection (for example) the 5th record a query (or the 32nd of a query)

Thank you

Instead of doing this:

MyFile.swf? ID =#PickID #

Maybe you should set a variable with the value returned by your cfoutput statement, then use this variable as both your setting and picID URL in your second query value. Something like this:

(Note to Azadi: the value of RND_PICK is not the ID value, but the value of the number of records of the line returned by the first query that contains the ID of interest.)

Phil

Tags: ColdFusion

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    Can help get the query

    A logic that is easier to implement this is as below

    SQL> with t as (select 'jan' Month, 9001 ProductNo,'1001-09'  CustomerNo,100 Units from dual union all
  2  select 'jan', 9002, '1002-09', 200 from dual union all
  3  select 'jan', 9003, '1003-09', 300 from dual union all
  4  select 'jan', 9001, 'ABCCustomer', 400 from dual union all
  5  select 'Jan', 9002, '1004-09', 500 from dual)
  6  select month,productno,case when upper(substr(customerno,1,1))=lower(substr(customerno,1,1))
  7  then 'CN_'||customerno else customerno end customerno,units from t;

MON  PRODUCTNO CUSTOMERNO          UNITS
--- ---------- -------------- ----------
jan       9001 CN_1001-09            100
jan       9002 CN_1002-09            200
jan       9003 CN_1003-09            300
jan       9001 ABCCustomer           400
Jan       9002 CN_1004-09            500

    TRY WITH THIS upper (substr(customerno,1,1)) = lower (substr(customerno,1,1))

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