An<u> existence check</u> is a data validation rule that should be applied to mandatory data articles.
<h3>What are the rules of data validation?</h3>
What are data validation rules Data validation rules control what constants can be joined into a cell, e.g. any whole number between 0 and 9, or one of several values from another part of the spreadsheet
<h3>What is a presence check?</h3>
A method of verification that checks if the user has entered some data. This is sometimes described as a “required field” when completing an online form. Reality checks are important as they help to avoid accepting partial information which cannot be rectified later.
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Complete question is,
• A synchronic check
• Range check
• Sequence check
• Existence check
Explanation:
The use of computer in business field is increasing day by day. Computers have been heart of modern business. In business, computer help in several kinds...of work such as to keep the records of goods of employees, measure the quantity of goods, send e-maila, communicate with the customers, give online services to customers, control the branch offices from the main offices, and so on....
Explanation:
computer is an electronic machine which category write in computer data
