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Tricky select
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General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Title:
Miscellaneous
Thread ID:
00587576
Message ID:
00587585
Views:
29
Hi,

Me again. Sometimes it really helps to explain the problem. I think, figured this one out. I would need several selects instead of one...

Something like:
select rcode, town, max(ExtrYear+ExtrWeek) as PriorWeek ;
       from FilingDates group by 1,2 ;
       having !empty(Record_Fm) ;
       where ExtrYear+ExtrWeek < CurrentWeek into cursor curTemp

Select Record_Fm as Prior_Fm,... from FilingDates inner join curTemp...
>Hi everybody,
>
>Is there a way to create a cursor, which contains information about current record in the table and the most closest date, where it has data.
>
>Currently I have this SQL:
>
>	select fd1.DsID, fd1.rcode, fd1.town, ;
>		fd1.Record_fm, fd1.Record_to, ;
>		fd1.LandCt_fm, fd1.LandCt_to, ;
>		nvl(fd2.Record_fm,{}) as PriorRec_fm, ;
>                nvl(fd2.Record_to,{}) as PriorRec_To, ;
>		nvl(fd2.LandCt_fm,{}) as PriorLC_fm, ;
>                nvl(fd2.LandCt_to,{}) as PriorLC_to ;
>                from FilingDate fd1 left join FilingDate fd2 ;
>		on fd1.DsID=fd2.DsID ;
>		where fd1.rcode+fd1.town+fd1.ExtrYear+ ;
>                      fd1.ExtrWeek =  m.lcRtWeek ;
>			and fd2.rcode+fd2.town+fd2.ExtrYear+ ;
>                            fd2.ExtrWeek = m.lcRtPriorWeek ;
>			order by 2,3 ;
>			into cursor TmpDates
>
>However, lcRtPriorWeek is different for each town and should be the week, when last time information was recorded prior to the current date.
>
>Can this select statement be modified or I need to use scan loop through the table and find it one by one. If so, how can I construct my index?
>rcode+town+ExtrYear+ExtrWeek descending, right?
>
>Thanks in advance.
If it's not broken, fix it until it is.


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