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Re: [libreoffice-users] Base/HSQL table with more than two dimensions?


What I see, you are talking about three tables which contain data: readings, days, and years. A fourth table should be created containing three foreign keys for these three tables. What you need for this data is a relational database which Base can create. Just make sure you normalize these tables. You might want to read up on relational databases to see how to do this.

Dan

On 6/24/20 02:28, John Kaufmann wrote:
A lectionary is an ordered set of readings, typically using a cycle of three or more years, to cover the Bible. In a four-year cycle the years are simply designated {A,B,C,D}, and for each day in a year readings are prescribed from different parts of the Bible. For any year, storing the readings in a database table is straightforward in two dimensions [fields (readings) x records (days)], and it is simple to SELECT the set of readings (usually from four different fields) for any day.

Obviously it is possible to do this in one table per year (say, four tables for four years), but since the pattern of records and fields is the same for all years, that is clumsy and should be unnecessary. It should be possible to do a table of three dimensions, of which the third dimension is the year {A,B,C,D} in the cycle, so that one could compare the readings for any given day across all years. But I don't see how to extend tables into three (as in this case) or more dimensions. Can someone point me in the right direction?  [It seems like this kind of database design issue should be common to a lot of domains.]

Thanks,
John


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[libreoffice-users] Base/HSQL table with more than two dimensions?John Kaufmann <kaufmann@nb.net>
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