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
Database Redesign Database redesign is especially difficult if the database has no data. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign If a database is built correctly the first time, it will not have to be redesigned. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Adding null columns to a table is straightforward. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following SQL statements are helpful in database redesign? Both of the above are helpful None of these EXISTS/NOT EXISTS expressions only Correlated subqueries only Both of the above are helpful None of these EXISTS/NOT EXISTS expressions only Correlated subqueries only 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 table containing the foreign key. All of these drop the primary key. drop the foreign key constraint. drop the table containing the foreign key. All of these drop the primary key. ANSWER DOWNLOAD EXAMIANS APP
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