Information Communication Technology ICT – 15 Proofing | e-Consult

Three validation rules a database administrator could implement are:

1. Data Type Validation: Ensuring that each field in the database stores the correct data type (e.g., a phone number field only accepts numeric characters). This is important because it prevents errors caused by incorrect data being entered into fields. For example, preventing text from being entered into a numerical quantity field.
2. Range Validation: Specifying acceptable ranges for numeric data. For example, ensuring that a customer's age is within a reasonable range (e.g., 0-120). This prevents unrealistic or erroneous data from being stored.
3. Format Validation: Enforcing specific formats for data, such as phone numbers (e.g., (XXX) XXX-XXXX) or postal codes (e.g., ABC 1234). This ensures consistency and readability of the data.