Database Redesign How many copies of the database schema are typically used in the redesign process? Four Two One Three Four Two One Three ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The EXISTS keyword will be true if: all rows in the subquery fail the condition only. both of these two conditions are met. any row in the subquery meets the condition only. neither of these two conditions is met. all rows in the subquery fail the condition only. both of these two conditions are met. any row in the subquery meets the condition only. neither of these two conditions is met. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign To drop a column that is used as a foreign key, first: All of these drop the table containing the foreign key. drop the foreign key constraint. drop the primary key. All of these drop the table containing the foreign key. drop the foreign key constraint. drop the primary key. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign A regular subquery can be processed: None of these from the top down. from the bottom up. by nesting. None of these from the top down. from the bottom up. by nesting. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Database redesign is especially difficult if the database has no data. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign A tool that can help designers understand the dependencies of database structures is a: dependency graph. graphical display. data model. None of these dependency graph. graphical display. data model. None of these ANSWER DOWNLOAD EXAMIANS APP
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