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  3. November 2010

Re: time/date as key fields

Why use a left outer join? Well, any time you need to process all the parent records, and have values from children that match. In embedded SQL, the join gives you just one statement to process, only one cursor. One alternative is prepared statements with parameter markers and FETCH... USING... - the latter may have a slight advantage over a remote network but is more complex code, certainly - doable of course.

Vern

On 11/21/2010 1:43 AM, dieter.bender@xxxxxxxxxxxx wrote:
... maybe I don't use left outer joins from a parent with its child (why
should one do this) and so I've had no chance to recognize the effects of
this feature.
BTW: I'm using RI constraints, wherever possible and allowed by my
custumors; in most cases they don't wanna use them...


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