Which of the following modifications may not succeed? 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 TRUE ANSWER : ? YOUR ANSWER : ?
A regular subquery can be processed: None of these from the top down. from the bottom up. by nesting. TRUE ANSWER : ? YOUR ANSWER : ?
The data model produced from the reverse engineering process is a true logical model. False True TRUE ANSWER : ? YOUR ANSWER : ?
The EXISTS keyword will be true if any row in the subquery meets the condition. True False TRUE ANSWER : ? YOUR ANSWER : ?
The data model produced from the reverse engineering process does not include intersection table data. False True TRUE ANSWER : ? YOUR ANSWER : ?
What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0? ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0); None of these TRUE ANSWER : ? YOUR ANSWER : ?
How many copies of the database schema are typically used in the redesign process? Three One Four Two TRUE ANSWER : ? YOUR ANSWER : ?
Which SQL-92 standard SQL command can be used to change a table name? CHANGE TABLE ALTER TABLE None of these RENAME TABLE TRUE ANSWER : ? YOUR ANSWER : ?
Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database. False True TRUE ANSWER : ? YOUR ANSWER : ?