Re: what is wrong with this idea ...

With individual columns you save on the CPU cycles/time involved to parse the string and extract each character.
Additionally, if you ever need to update this string, it would be tedious. IMO, its always better to have atomic data since one can then leverage the features of the DBMS.

With Warm Regards,
Manav.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Wednesday, August 14, 2002 6:18 AM

> Hi. We have a table in our data warehouse which keeps
> info about calls made. This table has a child table
> with some detailed information about parts of the
> call. There may be any number of "parts" within a call
> (1 to many) and every part has a status.
>
> MY developer wants to add a string field to the parent
> table which will concatinate all the statuses for
> all the parts within this call. For example if
> a call has 4 parts and their statuses are "A","B","A"
> and "F", the value of that field will be "ABFA". Then
> the developer will be able to query smalle parent
> table instead of a large child table in order to see
> how many calls had at least one part with status "A"
> or statuses "A" and "F" etc by using a INSTR (or
> SUBSTR) command.
>
> Would it be better (from performance/CPU standpoint)
> to add several separate fields: STATUS_A_CNT,
> STATUS_B_CNT (the list of status codes is fairly
> static) instead? There is something about this string
> that rubs me the wrong way, but I can't put my finger
> on it.
>
> Any thoughts?
>
> thank you
>
> Gene
>
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-- 
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-- 
Author: Manavendra Gupta
  INET: manav_at_zycus.com

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