Introduction to Database System Which of the following is not characteristic of a relational database model? tables records complex logical relationships treelike structure tables records complex logical relationships treelike structure ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to select only one copy of each set of duplicable rows SELECT DISTINCT None of these SELECT UNIQUE All of these SELECT DIFFERENT SELECT DISTINCT None of these SELECT UNIQUE All of these SELECT DIFFERENT ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If you want your database to include methods, you should use a _____ database. Network Object-Oriented Hierarchical Distributed Network Object-Oriented Hierarchical Distributed ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier? Strong entity Weak entity ID- independent entity ID-dependent entity Strong entity Weak entity ID- independent entity ID-dependent entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The relational model uses some unfamiliar terminology. A tuple is equivalent to a field record data base data item field record data base data item ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If a piece of data is stored in two places in the database, then None of these storage space is wasted both (a) and (b) changing the data is one spot will cause data inconsistency it can be more easily accessed None of these storage space is wasted both (a) and (b) changing the data is one spot will cause data inconsistency it can be more easily accessed ANSWER DOWNLOAD EXAMIANS APP
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