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Retrieve the S&S In-Chapter Database (in Microsoft Access format) from the text's Web site (or create the tables in Table 4-5 in a relational DBMS product). Write queries to answer the following questions. Note: For some questions, you may have to create two queries-one to calculate an invoice total and the second to answer the question asked.
* a. How many different kinds of inventory items does S&S sell?
* b. How many sales were made during October?
* c. What were total sales in October?
* d. What was the average amount of a sales transaction?
* e. Which salesperson made the largest sale?
* f. How many units of each product were sold?
* g. Which product was sold most frequently?
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
What is called an evaluation primitive? A relational algebra operation annotated with instructions on how to evaluate is known as an evaluation primitive.
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File Manager File manager handles the allocation of space on disk storage. It starts and maintains the list of structures and indices described in the internal schema that is
Benefits and limitations
Aggregate functions Some of these functions are min, count, max, and avg. These functions help in getting consolidated information from a set of tuples. Example:
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Explain the ACID properties of a transaction Ans: ACID properties are a significant concept for databases. The ACID stands for Atomicity, Consistency, Isolation, and Durability
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