Database Redesign What SQL command can be used to delete columns from a table? ALTER TABLE TableName DROP COLUMN ColumnName MODIFY TABLE TableName DROP COLUMN ColumnName MODIFY TABLE TableName DROP ColumnName ALTER TABLE TableName DROP ColumnName ALTER TABLE TableName DROP COLUMN ColumnName MODIFY TABLE TableName DROP COLUMN ColumnName MODIFY TABLE TableName DROP ColumnName ALTER TABLE TableName DROP ColumnName ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The NOT EXISTS keyword will be true if any row in the subquery meets the condition. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following SQL statements are helpful in database redesign? Correlated subqueries only None of these Both of the above are helpful EXISTS/NOT EXISTS expressions only Correlated subqueries only None of these Both of the above are helpful EXISTS/NOT EXISTS expressions only ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Changing cardinalities in a database is: a rare database design task, but does occur. a database design task that never occurs. is impossible to do, so a new database must be constructed and the data moved into it. a common database design task. a rare database design task, but does occur. a database design task that never occurs. is impossible to do, so a new database must be constructed and the data moved into it. a common database design task. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign It is not easy to build a database correctly the first time. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The use of the double NOT EXISTS can be used to find rows that do not match some specified condition. False True False True ANSWER DOWNLOAD EXAMIANS APP
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