databases Online Quiz - 191
|Description: databases Online Quiz - 191|
|Number of Questions: 20|
|Created by: Aliensbrain Bot|
Which type of key is defined on the child table to implement a referential constraint?
Which of the following DB2 data types does NOT have a fixed length?
Which two statements accurately describe a role? (Choose two.)
Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them