Database Redesign Typically, there should be at least two different copies of the database schema used in the redesign process. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The process of reading a database schema and producing a data model from that schema is known as: reverse engineering. data modeling. database design. None of these reverse engineering. data modeling. database design. None of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which SQL-92 standard SQL command can be used to change a table name? RENAME TABLE None of these ALTER TABLE CHANGE TABLE RENAME TABLE None of these ALTER TABLE CHANGE TABLE ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which is not true of a correlated subquery? They are very similar to a regular subquery. The processing of the SELECT statements is nested. They can be used to verify functional dependencies. EXISTS/NOT EXISTS is a form of a correlated subquery. They are very similar to a regular subquery. The processing of the SELECT statements is nested. They can be used to verify functional dependencies. EXISTS/NOT EXISTS is a form of a correlated subquery. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign To drop a column that is used as a foreign key, first: drop the foreign key constraint. drop the primary key. drop the table containing the foreign key. All of these drop the foreign key constraint. drop the primary key. drop the table containing the foreign key. All of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Before any changes to database structure are attempted one should first: clearly understand the current structure and contents of the database only. create a complete backup of the operational database only. test any changes on a test database only. All of these clearly understand the current structure and contents of the database only. create a complete backup of the operational database only. test any changes on a test database only. All of these ANSWER DOWNLOAD EXAMIANS APP
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