If a database is built correctly the first time, it will not have to be redesigned. True False TRUE ANSWER : ? YOUR ANSWER : ?
The NOT EXISTS keyword will be true if: both of these two conditions are met. neither of these two conditions is met. any row in the subquery meets the condition. all rows in the subquery fail the condition. TRUE ANSWER : ? YOUR ANSWER : ?
What SQL command can be used to add columns to a table? MODIFY TABLE TableName ADD ColumnName ALTER TABLE TableName ADD ColumnName MODIFY TABLE TableName ADD COLUMN ColumnName ALTER TABLE TableName ADD COLUMN ColumnName TRUE ANSWER : ? YOUR ANSWER : ?
A regular subquery can be processed: None of these from the bottom up. from the top down. by nesting. TRUE ANSWER : ? YOUR ANSWER : ?
The EXISTS keyword will be true if: both of these two conditions are met. any row in the subquery meets the condition only. all rows in the subquery fail the condition only. neither of these two conditions is met. TRUE ANSWER : ? YOUR ANSWER : ?
How many copies of the database schema are typically used in the redesign process? Four Two Three One TRUE ANSWER : ? YOUR ANSWER : ?
How can you find rows that do not match some specified condition? NOT EXISTS None of these EXISTS Double use of NOT EXISTS TRUE ANSWER : ? YOUR ANSWER : ?
The data model produced from the reverse engineering process is a true logical model. False True TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following SQL statements are helpful in database redesign? EXISTS/NOT EXISTS expressions only Both of the above are helpful None of these Correlated subqueries only TRUE ANSWER : ? YOUR ANSWER : ?