COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Checks that an input fits certain parameters such as length.
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Checks that inputted data is completely correct.
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Checks that there is no redundant data in a field.
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Checks that the correct SQL Query has been used.
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Detailed explanation-1: -Data validation means checking the accuracy and quality of source data before using, importing or otherwise processing data. Different types of validation can be performed depending on destination constraints or objectives. Data validation is a form of data cleansing.
Detailed explanation-2: -The length check is a validation check which ensures that the data entered is no longer than a specified maximum number of characters. This is particularly important if a fixed length field is being used to store the data.
Detailed explanation-3: -Excel can restrict data entry to certain cells by using data validation, prompt users to enter valid data when a cell is selected, and display an error message when a user enters invalid data.