Introduction to Database System A key is a group of one or more attributes that uniquely identifies a row. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not a restriction for a table to be a relation? The columns must be ordered. No two rows in a table may be identical. The cells of the table must contain a single value. All of the entries in any column must be of the same kind. The columns must be ordered. No two rows in a table may be identical. The cells of the table must contain a single value. All of the entries in any column must be of the same kind. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The master list of an indexed file has a number assigned to each record is sorted in ascending order contains only a list of keys and record numbers both (b) and (c) None of these has a number assigned to each record is sorted in ascending order contains only a list of keys and record numbers both (b) and (c) None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The degree of a relationship refers to the number of entity classes in the relationship. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n): normal form. insertion anomaly. referential integrity constraint. transitive dependency. normal form. insertion anomaly. referential integrity constraint. transitive dependency. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A data dictionary doesn't provide information about: It allows a many-to-many relationship where data is located It is conceptually simple It will be the dominant data base of the future the size of the disk storage device It allows a many-to-many relationship where data is located It is conceptually simple It will be the dominant data base of the future the size of the disk storage device ANSWER DOWNLOAD EXAMIANS APP
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