Thanks for the steer, Mike. I’ve not really used arrays before, but this sounds a more efficient approach - so I’ll wok through the lessons & docs. Best, Keith..
> On 15 Mar 2015, at 13:21, Mike Doub <[email protected]> wrote: > > Basically createa direct access to all the child tables. > > On Sunday, March 15, 2015, Mike Doub <[email protected]> wrote: > >> Would it not be better to make the child table into an array indexed by >> its ID, then make a single pass thru the parent table using the child ID >> into the array. >> >> Mike >> >> On Sunday, March 15, 2015, Keith Clarke <[email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >> >>> Folks, >>> Is there a ‘smart’ way to denormalise ‘child' & ‘parent' CSV tables >>> extracted from an RDBMS in LiveCode or is it down to iterating through >>> lists using chunk functions? >>> >>> I have four tables, related in the database as >>> Child-Parent-GrandParent-GreatGrandParent. Each file has its own record ID >>> & the ID of its direct parent. I need to create a ‘DenormalisedChild' file >>> with GrandParent & GreatGrandParent IDs appended to each row. >>> >>> I’m currently assuming the only way forward is to build a >>> tDenormalisedChild variable by repeated iteration at each ‘level’: >>> Iterating through lines of the Child file to compare its ChildParentId >>> with each row in the the Parent file, until ParentRowId = ChildParentId; >>> Repeat (1) on Parent file rows to find ParentGrandParent values; >>> Repeat (1) on GrandParent file rows to get GreatGrandParent values >>> >>> Is their a more efficient approach? >>> Best, >>> Keith.. >>> _______________________________________________ >>> use-livecode mailing list >>> [email protected] >>> Please visit this url to subscribe, unsubscribe and manage your >>> subscription preferences: >>> http://lists.runrev.com/mailman/listinfo/use-livecode >> >> > _______________________________________________ > use-livecode mailing list > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
