Database Redesign To drop a column that is used as a foreign key, first: 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. All of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign What SQL command can be used to add columns to a table? MODIFY TABLE TableName ADD ColumnName ALTER TABLE TableName ADD ColumnName ALTER TABLE TableName ADD COLUMN ColumnName MODIFY TABLE TableName ADD COLUMN ColumnName MODIFY TABLE TableName ADD ColumnName ALTER TABLE TableName ADD ColumnName ALTER TABLE TableName ADD COLUMN ColumnName MODIFY TABLE TableName ADD COLUMN ColumnName ANSWER DOWNLOAD EXAMIANS APP
Database Redesign A regular subquery can be processed: None of these by nesting. from the bottom up. from the top down. None of these by nesting. from the bottom up. from the top down. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign How can you find rows that do not match some specified condition? None of these Double use of NOT EXISTS EXISTS NOT EXISTS None of these Double use of NOT EXISTS EXISTS NOT EXISTS ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following modifications may not succeed? Neither of the above actions will succeed Changing a column data type from numeric to char Changing a column data type from char to date Both of the above actions should succeed Neither of the above actions will succeed Changing a column data type from numeric to char Changing a column data type from char to date Both of the above actions should succeed 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 clearly understand the current structure and contents of the database only. test any changes on a test database only. create a complete backup of the operational database only. All of these clearly understand the current structure and contents of the database only. test any changes on a test database only. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS