Database Redesign Reverse engineering is the process of reading a database schema and producing a data model from that schema. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The EXISTS keyword will be true if any row in the subquery meets the condition. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Changing cardinalities in a database is: a rare database design task, but does occur. is impossible to do, so a new database must be constructed and the data moved into it. a database design task that never occurs. a common database design task. a rare database design task, but does occur. is impossible to do, so a new database must be constructed and the data moved into it. a database design task that never occurs. a common database design task. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Before any changes to database structure are attempted one should first: test any changes on a test database only. create a complete backup of the operational database only. clearly understand the current structure and contents of the database only. All of these test any changes on a test database only. create a complete backup of the operational database only. clearly understand the current structure and contents of the database only. All of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Because of the need for extensive knowledge of SQL, many database developers choose to automate the redesign process. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign A regular subquery can be processed: by nesting. from the top down. None of these from the bottom up. by nesting. from the top down. None of these from the bottom up. ANSWER DOWNLOAD EXAMIANS APP
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