Database Redesign Before any changes to database structure are attempted one should first: clearly understand the current structure and contents of the database only. test any changes on a test database only. All of these create a complete backup of the operational database only. clearly understand the current structure and contents of the database only. test any changes on a test database only. All of these create a complete backup of the operational database only. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign A regular subquery is processed from the bottom up. True False True False 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 The NOT EXISTS keyword will be true if any row in the subquery meets the condition. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign To drop a column that is used as a foreign key, first: drop the foreign key constraint. All of these drop the primary key. drop the table containing the foreign key. drop the foreign key constraint. All of these drop the primary key. drop the table containing the foreign key. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database. False True False True ANSWER DOWNLOAD EXAMIANS APP
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