Example Accounts whose account-number begins with the digit 9 are special high-interest accounts with a minimum balance of 2500. General constraint:'If the first digit of t [account-number]is 9,then t [balance]≥2500." DKNF design: Regular-acct-schema =(branch-name,account-number, balance) Special-acct-schema=(branch-name,account-number, balance) Domain constraints for {Special-acct-schema}require that for each account: The account number begins with 9. The balance is greater than 2500. Database System Concepts,5th Ed. C.11 ©Silberschat乜，Korth and SudarshanDatabase System Concepts, 5 C.11 ©Silberschatz, Korth and Sudarshan th Ed. Example Accounts whose account-number begins with the digit 9 are special high-interest accounts with a minimum balance of 2500. General constraint: ``If the first digit of t [account-number] is 9, then t [balance]  2500.'' DKNF design: Regular-acct-schema = (branch-name, account-number, balance) Special-acct-schema = (branch-name, account-number, balance) Domain constraints for {Special-acct-schema} require that for each account: The account number begins with 9. The balance is greater than 2500