Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database. True False 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); None of these ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0); TRUE ANSWER : ? YOUR ANSWER : ?
The data model that is produced from reverse engineering is: a conceptual model. a logical model. None of these an internal model. TRUE ANSWER : ? YOUR ANSWER : ?
What SQL command can be used to delete columns from a table? MODIFY TABLE TableName DROP ColumnName ALTER TABLE TableName DROP ColumnName MODIFY TABLE TableName DROP COLUMN ColumnName ALTER TABLE TableName DROP COLUMN ColumnName TRUE ANSWER : ? YOUR ANSWER : ?
What SQL command can be used to add columns to a table? ALTER TABLE TableName ADD ColumnName MODIFY TABLE TableName ADD ColumnName MODIFY TABLE TableName ADD COLUMN ColumnName ALTER TABLE TableName ADD COLUMN ColumnName TRUE ANSWER : ? YOUR ANSWER : ?
Database redesign is not terribly difficult if the: database has no data. database is structured. database is well-designed. database is relatively small. TRUE ANSWER : ? YOUR ANSWER : ?
Database redesign is especially difficult if the database has no data. False True TRUE ANSWER : ? YOUR ANSWER : ?
The SQL-92 command to change a table name is RENAME TABLE. True False TRUE ANSWER : ? YOUR ANSWER : ?
Typically, there should be at least two different copies of the database schema used in the redesign process. False True TRUE ANSWER : ? YOUR ANSWER : ?