Database Redesign How many copies of the database schema are typically used in the redesign process? Four One Two Three Four One Two Three ANSWER DOWNLOAD EXAMIANS APP
Database Redesign 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 ADD CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0); None of these ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0); ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0); None of these ANSWER DOWNLOAD EXAMIANS APP
Database Redesign It is not easy to build a database correctly the first time. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign To drop a column that is used as a foreign key, first: drop the table containing the foreign key. drop the primary key. All of these drop the foreign key constraint. drop the table containing the foreign key. drop the primary key. All of these drop the foreign key constraint. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Before any changes to database structure are attempted one should first: All of these clearly understand the current structure and contents of the database only. test any changes on a test database only. create a complete backup of the operational database only. All of these clearly understand the current structure and contents of the database only. test any changes on a test database only. create a complete backup of the operational database only. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Because of the need for extensive knowledge of SQL, many database developers choose to automate the redesign process. True False True False ANSWER DOWNLOAD EXAMIANS APP
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