To drop a key column in an existing table (with existing data) you must first remove...
To drop a key column in an existing table (with existing data) you must first remove the constraints that apply to that key
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To drop a key column in an existing table (with existing data)
you must first remove...
1.Imposing a foreign key constraint on the column of a table prevents that column from having...
1.Imposing a foreign key constraint on the column of a table prevents that column from having null values; thus, the NOT NULL constraint does not have to be added for that column to assure it is not null. True False 2. A condition is part of a CHECK constraint. A condition consists of which universal computing pattern? a. expression - logical operator - expression b. condition - comparison operator - condition c. expression - comparison operator - expression 3. You...
7- The values of a Foreign Key column in a table can be referenced to any...
7- The values of a Foreign Key column in a table can be referenced to any column in a second table (Primary key or non-primary key). TRUE FALSE) 8- Using WITH GRANT OPTION clause will result in granting the user the authority to pass ONLY his/her privileges to other users. TRUE FALSE ) 9. To change the characteristics of a column, use the ALTER TABLE command with a SET clause. TRUE FALSE) 10- When inserting new values into a table...
The employee is table, the best candidate for primary key is Select one: a. Department ID...
The employee is table, the best candidate for primary key is Select one: a. Department ID b. Employee hiredate c. Employee ID d. Employee salary Question 2 A primary key can be composed of more than one attribute. Select one: True False Question 3 A foreign key allows you to join two tables. Select one: True False Question 4 Given two tables, department (dept_id, dept_location, dept_name) and EMPLOYEE(emp_id, emp_name, emp_dept_id, emp_name, emp_salary), which attribute (column) is the foreign key? Select...
16. The primary key is selected from the: Group of answer choices composite keys. foreign keys....
16. The primary key is selected from the: Group of answer choices composite keys. foreign keys. candidate keys. surrogate keys. 17. "Delete Table" statement is used to remove a table definition and all the data, indexes, triggers, constraints and permission specifications for that table. Group of answer choices True False 18. Which of the following commands always affect one row at a time when it runs? Group of answer choices Drop Insert Delete Update 19. Data stored as an image...
A foreign key value must exist in the table where it is a primary key. True?...
A foreign key value must exist in the table where it is a primary key. True? False?
You are designing a table for employee data of a company. You have a requirement to...
You are designing a table for employee data of a company. You have a requirement to identify if an employee is a United States citizen or not. You have designed a table called EMPLOYEE to store information related to each employee and you have a column called US CITIZEN INDICATOR to store if an employee is a US citizen or not. You only want to store values "Y" or "N" in this column. From the following options, what is the...
when you establish a relationship between a primary and foriegn key, the dbms can enforce integrity...
when you establish a relationship between a primary and foriegn key, the dbms can enforce integrity constraints? true or false what database key links one table to another? what data base function allows you to define the data your database is storing?
rider_student Column Data Type Description student_id integer the primary key first_name varchar(25) student first name last_name...
rider_student Column Data Type Description student_id integer the primary key first_name varchar(25) student first name last_name varchar(25) student last name major_id integer the ID of the student's major; a foreign key for the major_id in the rider_major table rider_major Column Data Type Description major_id integer the primary key major_name varchar(50) student first name major_description varchar(100) student last name Use the Tables above to answer the questions. Questions: 1. Write a SQL statement to add a student record to the rider_student...
If the following appeared in a CREATE TABLE statement FOREIGN KEY (PersonID) REFERENCES Persons(PersonID) true false...
If the following appeared in a CREATE TABLE statement FOREIGN KEY (PersonID) REFERENCES Persons(PersonID) true false - The jable bong crealed must have a column named PeolD true false -The CREATE TABLEWill fail becaue2 tables can ut have a field with the named PersonlD true false -personlD in thi table must be UNIQUE true false- There must be a diftorent table named Pasons Deviousl reated Record Answer
You need to add a FOREIGN KEY constraint to the line_item_id column in the curr_order table...
You need to add a FOREIGN KEY constraint to the line_item_id column in the curr_order table to refer to the id column in the line_item table. Which statement should you use to achieve this result? A. ALTER TABLE curr_order ADD CONSTRAINT curr_order_fk FOREIGN KEY (line_item_id) REFERENCES line_item(id); B. ALTER TABLE curr_order MODIFY (CONSTRAINT curr_order_fk FOREIGN KEY (line_item_id) REFERENCES line_item(id)); C. ALTER TABLE line_item ADD CONSTRAINT line_item_fk FOREIGN KEY (id) REFERENCES curr_order(line_item_id); D. ALTER TABLE line_item MODIFY (CONSTRAINT line_item_fk FOREIGN KEY...
7- The values of a Foreign Key column in a table can be referenced to any column in a second table (Primary key or non-primary key). TRUE FALSE) 8- Using WITH GRANT OPTION clause will result in granting the user the authority to pass ONLY his/her privileges to other users. TRUE FALSE ) 9. To change the characteristics of a column, use the ALTER TABLE command with a SET clause. TRUE FALSE) 10- When inserting new values into a table...
You are designing a table for employee data of a company. You have a requirement to identify if an employee is a United States citizen or not. You have designed a table called EMPLOYEE to store information related to each employee and you have a column called US CITIZEN INDICATOR to store if an employee is a US citizen or not. You only want to store values "Y" or "N" in this column. From the following options, what is the...
If the following appeared in a CREATE TABLE statement FOREIGN KEY (PersonID) REFERENCES Persons(PersonID) true false - The jable bong crealed must have a column named PeolD true false -The CREATE TABLEWill fail becaue2 tables can ut have a field with the named PersonlD true false -personlD in thi table must be UNIQUE true false- There must be a diftorent table named Pasons Deviousl reated Record Answer
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