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?
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A foreign key value must exist in the table where it is a
primary key.
True?...
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...
8. True or False? 8.The primary key of the Employees table would be posted in the...
8.
True or False?
8.The primary key of the Employees table would be posted in the
Production Steps table as a foreign key.
26.The primary key of the Production Steps table would be posted
in the Production Plan table as a foreign key.
39. The link between the Products and Production Plan tables
would be implemented as a linking table.
0.. Materials Production Steps 0... 0.. Production Plan Employees 0..* 1..1 1..1 Products are Products 0.. Production 0..* Authorization develope.
Which of the following describes referential integrity? A. A Primary Key of a relational table must...
Which of the following describes referential integrity? A. A Primary Key of a relational table must not contain a null value B. One fact must not be in multiple places C. The value for a foreign key attribute must either be null or match the one of the data value of that attribute in the table in which the attribute is a primary key D. Referential Integrity is a principle that prevents the use of redundancy, avoids null values and...
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
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...
QUESTION 6 Which of the following statements best illustrates the "Key" constraint? The schema MUST be...
QUESTION 6 Which of the following statements best illustrates the "Key" constraint? The schema MUST be created before tables are added A primary key MUST NOT have duplicate values A foreign key value MUST have a value already present as a primary key in another table (or be NULL) A primary key value MUST have a value QUESTION 7 Which of the following statements best illustrates the "Referential Integrity" constraint? The schema MUST be created before tables are added A...
Practice question! Will upvote best answer. Thank you. The primary key of a relation may have...
Practice question! Will upvote best answer. Thank you. The primary key of a relation may have more than one attribute. However, a foreign key of a relation must have only one attribute. Is this true or false?
True or False questions: 1. A data type mismatch error would occur when the primary key...
True or False questions: 1. A data type mismatch error would occur when the primary key data data type is auto number and the foreign key in the related table is number. 2. The data type long integer is the same as integer. 3. When using SQL, the SELECT clause isolates tables in the database. 4. A Referential Integrity violation occur when the primary key is null. 5. When an REA model has 7 entities ,2 linking tables, 3 Resource...
A foreign key is defined as a minimal super key that is new that does not...
A foreign key is defined as a minimal super key that is new that does not contain subset of attributes that is itself a super key. an attribute (or combination of attributes) that uniquely identifies each entity in a table. a key that is used strictly for data retrieval purposes. an attribute (or a combination of attributes) in one table whose values match the primary key in another table or whose values must be null.
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...
8.
True or False?
8.The primary key of the Employees table would be posted in the
Production Steps table as a foreign key.
26.The primary key of the Production Steps table would be posted
in the Production Plan table as a foreign key.
39. The link between the Products and Production Plan tables
would be implemented as a linking table.
0.. Materials Production Steps 0... 0.. Production Plan Employees 0..* 1..1 1..1 Products are Products 0.. Production 0..* Authorization develope.
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
QUESTION 6 Which of the following statements best illustrates the "Key" constraint? The schema MUST be created before tables are added A primary key MUST NOT have duplicate values A foreign key value MUST have a value already present as a primary key in another table (or be NULL) A primary key value MUST have a value QUESTION 7 Which of the following statements best illustrates the "Referential Integrity" constraint? The schema MUST be created before tables are added A...
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