It means where the computer checks whether the data is correct.
A database is only as useful as the data contained within it. Without data validation, inaccurate, invalid, obsolete or inconsistent data can be stored within the data tables leading to problems when the data is queried and analyzed.
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it is a piece of infomation.
Putting the data into it.
{| |+ Differences |- | Data warehouse database OLTP database Designed for analysis of business measures by categories and attributes Designed for real time business operations. Optimized for bulk loads and large, complex, unpredictable queries that access many rows per table. Optimized for a common set of transactions, usually adding or retrieving a single row at a time per table. Loaded with consistent, valid data; requires no real time validation Optimized for validation of incoming data during transactions; uses validation data tables. Supports few concurrent users relative to OLTP Supports thousands of concurrent users. |}http://www.geekinterview.com/question_details/15800
types of validations are: required field validation range validation pattern matching validation database specific validation numeric validation
The advantage of using validation rules in Microsoft Access is that you get clean and consistent data in your database.
A validation rule is simply to make sure that the data is entered correctly into the database (go onto bitesize-ICT-validation and verification for more info)
A validation rule is simply to make sure that the data is entered correctly into the database (go onto bitesize-ICT-validation and verification for more info)
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Validation on user inputs is very important for the security purpose of the database. If a user enters a wrong value many times then a database can be corrupt. Here are some database issues:Input attack.Buffer overflow.Automated input.Code injection.Hidden field manipulation.Cross-site scripting.Countermeasures.·
Validation rules help maintain the integrity of a database by enforcing data accuracy and consistency. They ensure that only valid data entries are allowed, preventing errors such as incorrect data types, values out of range, or missing values. This helps in maintaining data quality and reliability within the database.
Data Validation is a process that ensures that data entered into the database form, a web form, or a computer program conforms to the correct data type.
Data validation is all about what can be entered into a spreadsheet cell or database cell, you can choose an error message aswell as restricting what values can be entered, reducing human error and improving accuracy.
In a database it is important that data is put in accurately. One method of doing that is to use validation rules to restrict what people can put in. So you might have a school where children have to be over a certain age before they can join. You could build a validation rule to ensure they meet that requirement or to ensure that the person entering the data does not make a mistake when entering it. A validation rule will stop them making an error and with the Validation Text, it will give them a message telling them what their error is.
if it is valid or not
Did you mean to say what is a computerized database?