Answer:
The answer is "Referential integrity".
Explanation:
This relates to one aspect of data integrity. Data across multiple tables are linked via relationships. In view of the distinct customer & invoice tables, each invoice table should have the primary key specified throughout the Customer table, for instance. Whenever the invoice table contains a customer ID reference. This ID including its customer will be only a table of the customer.
Answer:
April 30, 1993
Explanation:
On April 30, 1993, four years after publishing a proposal for “an idea of linked information systems,” computer scientist Tim Berners-Lee released the source code for the world’s first web browser and editor.
Answer:
The answer to this question is true.
Explanation:
Google Analytics is the method of free tracking device which is offered by Google. Google Analytics shows how User visits website. It helps you exactly see the number of visitors that you store in the database.
It offers information about user behavior that can be critical for your business. The google Analytics refers a reference number which cannot be modified .So the given statement is true.
B) For Military Purposes but around the 1970s they became widely available to consumers.
