Improved data access. The DBMS makes it possible to produce quick answers to ad hoc queries. From…

Improved data access. The DBMS makes it possible to produce quick answers to ad hoc queries. From a database perspective, a query is a specific request for data manipulation (for example, to read or update the data) issued to the DBMS. Simply put, a query is a question and an ad hoc query is a spur-of-the-moment question. The DBMS sends back an answer (called the query result set) to the application. For example, end users, when dealing with large amounts of sales data, might want quick answers to questions (ad hoc queries) such as: What was the volume of sales by product during the past six months?? What is the sales bonus figure for each of our salespeople during the past three months?? How many of our customers have credit balances of R5 000 (or 3 000) or more?

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