On 11 Nov 2009, at 7:12pm, Rick Ratchford wrote: > To determine if the set is complete, there would clearly be data rows PRIOR > to the start date and data rows that FOLLOW the end date. This is how I'd > determine that a set is complete with all available data for those 'sample > date windows'.
This makes no sense to me. To determine if I have data for each workday within a period I need a definition of which days within the period are workdays. Either a table of all workdays, or a list of all non-workdays, or some other way of determination which is in a form SQL can access. In the financial systems I used to work with you'd usually find a TABLE which listed each day and it's workday number. So if the daynumber of today last year was, say, 88,000 the daynumber of today might be 88,250. To determine if I had data for every day in the last year I'd subtract 88,000 from 88,250 and then check to see whether I had data for 250 different days within the period. Simon. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
