From the list below, identify ALL the options to implement data integrity in the
ID: 3797065 • Letter: F
Question
From the list below, identify ALL the options to implement data integrity in the Database design. NOT NULL constraints Foreign Keys Identification of actors for Use Cases CHECK Constraints Using the correct data types for the columns the dataset below shows list of employees of an organization and the departments that the employees are working in. The EMPLOYEE_ID column of the dataset uniquely identifies an employee of the organization. The DEAPARTMENT_ID column of the dataset uniquely identifies a department of the organization. An employee of this organization can work only in one department of the organization. Based on the information provided, please normalize the given dataset. Your response should clearly indicate resultant tables after the normalization along with their columns. Also, please indicate all the primary keys and applicable foreign keys.Explanation / Answer
Ans. 4
Data Integrity: - Data Integrity refers to the accuracy and consistency of data stored in a database,
The options required to implement data Integrity in a Database Design are:
Explanation: -
Not Null: - The Not null constraint does not allow the data field to be empty, the user has to provide a value for the field which has a constraint NOT NULL.
Foreign Keys: - Foreign Keys are used to refer one table to other, in this way we can connect 2 tables, which allows us to store 2 different types of data but both tables having the data have a connection.
CHECK CONSTRAINT: - This Constraint Check the data with a specific condition which is allowed, if the data does not satisfy the check requirements the user is asked to enter the data again using the specific requirements. Example: - A constraint that the Employee ID must Start with the letter 'E'.
Using the Correct data type also comes under the Check constraint, it automatically checks whether the data type is of the desired type or not. But this is also required to maintain the integrity of the data.
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