Database Redesign The EXISTS keyword will be true if: any row in the subquery meets the condition only. both of these two conditions are met. all rows in the subquery fail the condition only. neither of these two conditions is met. any row in the subquery meets the condition only. both of these two conditions are met. all rows in the subquery fail the condition only. neither of these two conditions is met. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Before any changes to database structure are attempted one should first: test any changes on a test database only. create a complete backup of the operational database only. clearly understand the current structure and contents of the database only. All of these test any changes on a test database only. create a complete backup of the operational database only. clearly understand the current structure and contents of the database only. All of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which SQL-92 standard SQL command can be used to change a table name? ALTER TABLE RENAME TABLE None of these CHANGE TABLE ALTER TABLE RENAME TABLE None of these CHANGE TABLE ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The NOT EXISTS keyword will be true if: both of these two conditions are met. neither of these two conditions is met. all rows in the subquery fail the condition. any row in the subquery meets the condition. both of these two conditions are met. neither of these two conditions is met. all rows in the subquery fail the condition. any row in the subquery meets the condition. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign 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 EXISTS/NOT EXISTS expressions only Both of the above are helpful None of these Correlated subqueries only ANSWER DOWNLOAD EXAMIANS APP
Database Redesign How can you find rows that do not match some specified condition? None of these EXISTS NOT EXISTS Double use of NOT EXISTS None of these EXISTS NOT EXISTS Double use of NOT EXISTS ANSWER DOWNLOAD EXAMIANS APP
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