Question

“Union-compatible” means that the ____.

(A) number of attributes must be the same, but the names and data types can be different
(B) names of the relation attributes can be different, but the data types must be identical
(C) names of the relation attributes must be the same and their data types must be identical
(D) names of the relation attributes must be the same, but the data types can be different

Answer 1

(c) will be the correct option

Step-by-step explanation:

Union-compatible : If there are two relations and both have are having same number of attributes then it called union compatibility the domain of similar attributes also must be same for union compatibility. Number of attributes means number of column

so from above discussion it is clear that option (C) will be correct option