ocr: ACCRPE ATAD <pk> - not null AT NAME A50 not null AT_INTEREST RATE N notnulll AT DEF MINIMUM BAL S null CUSTOMER CUSTID <pk> - not nuil ATID-ATID CUST NAME A50 not nuil CUST PASSWORD A20 null ACCOUNIS CUST NOTES A255 null ACCTID <pk> - not null CUST LOGON ID A20 null ATID <ikx : not null CUSTID <iks not null ACCT MIN BALANCE not nuil CUST_JD-CUST_ID ACCT BALANCE - not nuil ACCT LAST STATEMENT : not nuil ACCTID-ACCTJD TRANSACL TRNID <pke nola null ACCTID <pkfk! - - notnull TRN REF A70: not. null Figure 2: The example datobase TRN AMOUNT > not null siruciure (<pkx LE primory key, TRN: TIMESTAMP T ...