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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.]


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