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: all rows in the subquery fail the condition. any row in the subquery meets the condition. neither of these two conditions is met. both of these two conditions are met. all rows in the subquery fail the condition. any row in the subquery meets the condition. neither of these two conditions is met. both of these two conditions are met. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Because of the importance of making data model changes correctly, many professionals are ________ about using an automated process for database redesign. skeptical optimistic ambivalent None of these skeptical optimistic ambivalent None of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Database redesign is especially difficult if the database has no data. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Before any changes to database structure are attempted one should first: create a complete backup of the operational database only. All of these test any changes on a test database only. clearly understand the current structure and contents of the database only. create a complete backup of the operational database only. All of these test any changes on a test database only. clearly understand the current structure and contents of the database only. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following modifications may not succeed? Both of the above actions should succeed Changing a column data type from numeric to char Neither of the above actions will succeed Changing a column data type from char to date Both of the above actions should succeed Changing a column data type from numeric to char Neither of the above actions will succeed Changing a column data type from char to date ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS