       :5.#969;1 #96;6063;60; ;.;./.:"79.;65655!;6921 4/111647;9&:;4:  99.:7777; '050.3%769; %%'% 9:65 .; 95519::65 !56#99. 1.916'6.9 37#.006  '050.3%769;%%'% :5.#969;1 #96;6063;60;;.;./.:"79.;65655 ##99.%:.90967 99.:7777;       

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...                                          Abstract-Database query languages on relations (for example SQL) make it possible to join two relations. This operation is very common in desktop/server database systems but unfortunately query processing systems in networked embedded computer systems currently do not support this operation; specifically, the query processing systems TAG, TinyDB, Cougar do not support this. We show how a prioritized medium access control (MAC) protocol can be used to efficiently execute the database operation join for networked embedded computer systems where all computer nodes are in a single broadcast domain.