Because of the need for extensive knowledge of SQL, many database developers choose to automate the redesign process. True False TRUE ANSWER : ? YOUR ANSWER : ?
What SQL command can be used to add columns to a table? MODIFY TABLE TableName ADD COLUMN ColumnName ALTER TABLE TableName ADD ColumnName ALTER TABLE TableName ADD COLUMN ColumnName MODIFY TABLE TableName ADD ColumnName TRUE ANSWER : ? YOUR ANSWER : ?
Before any changes to database structure are attempted one should first: 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. TRUE ANSWER : ? YOUR ANSWER : ?
It is not easy to build a database correctly the first time. False True TRUE ANSWER : ? YOUR ANSWER : ?
Some organizations take the stand that no application should ever employ the true name of a table. 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 : ?
Which of the following modifications may not succeed? Changing a column data type from char to date Neither of the above actions will succeed Both of the above actions should succeed Changing a column data type from numeric to char TRUE ANSWER : ? YOUR ANSWER : ?
Although creating test databases is a critical and necessary job, there are few career opportunities in this area. False True TRUE ANSWER : ? YOUR ANSWER : ?
Reverse engineering is the process of reading a database schema and producing a data model from that schema. True False TRUE ANSWER : ? YOUR ANSWER : ?