Question: A relation is considered a ( ) A . Column B . one - dimensional table C . two - dimensional table D . three

A relation is considered a () A. Column B. one-dimensional table C. two-dimensional table D. three-dimensional table. In the relational model, relationships between relations or tables are created by using: () A. composite keys B. determinants C. candidate keys. D. foreign keys 18 A key () A. must always be composed of two or more columns B. can only be one column. C. identifies a row. D. identifies a column

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