Final answer:
The correct constraint for queries calculating a company's cash balance is BETWEEN [begin_date] and [balance_date], ensuring all transactions within the period are included without exceeding the balance_date.
Step-by-step explanation:
When calculating a company's cash balance, the constraints used on cash receipt and cash disbursement dates in queries are crucial for accuracy. To ensure the data reflects all transactions up to a certain point without going over, the constraint BETWEEN [begin_date] and [balance_date] should be used. This constraint includes all transactions starting at the begin_date and up to, but not exceeding, the balance_date. Therefore, for a company's cash balance calculation, cash receipts and disbursements should be included if they occur on or after the begin_date and on or before the balance_date. This properly captures all relevant cash flows within the specified period and provides an accurate cash balance for the company.