According to one reference, the union compatibility is defined as such: (1)the two relations have the same degree n (number of attributes) , and (2) domain (Ai)= domain (Bi) for 1= thank you <:>
: According to one reference, the union compatibility is defined as : such: : (1)the two relations have the same degree n (number of attributes) , : and (2) domain (Ai)= domain (Bi) for 1= 0 no rows returned [/code]
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: such:
: (1)the two relations have the same degree n (number of attributes) ,
: and (2) domain (Ai)= domain (Bi) for 1= 0
no rows returned
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