Introduction to Database

Introduction to Database 1. The relational database model was created by E.F. Codd. A True B.False .

Answer: Option A Explanation: The relational model for database management is a database model based on first-order predicate logic, first formulated and proposed in 1969 by E.F. Codd. 2. A database is called "self-describing" because it contains a description of itself. A True B.False .

Answer: Option A 3. In a database, data is stored in spreadsheets which have rows and columns. A True B.False .

Answer: Option B 4. A database has data and relationships. A True B.False .

Answer: Option A 5. One of the reasons why OODBMSs have not been widely used for business information systems is that OOP is obsolete. A True B.False .

Answer: Option B 6. In an enterprise-class database system, business users interact directly with database applications, which directly access the database data. A True B.False .

Answer: Option B 7. Applications are programs that interact directly with the database. A True B.False .

Answer: Option B 8. The purpose of a database is to help people stop using spreadsheets. A True B.False .

Answer: Option B 9. Microsoft Access is an enterprise-class database product. A True B.False .

Answer: Option B 10. Structured Query Language (SQL) is an internationally recognized standard language that is understood by all commercial database management system products. A.True B.False

Answer: Option A 11. The XML family of standards is very important in database processing today. A.True B.False

Answer: Option A 12. A database has a built-in capability to create, process and administer itself. A.True B.False

Answer: Option B 13. Enterprise Resource Planning (ERP) is an example of a single user database. A.True B.False

Answer: Option B 14. Prior to 1970, all data was stored in separate files, which were mostly stored on reels of magnetic tape. A.True B.False

Answer: Option A 15. A database design may be based on existing data. A.True B.False Answer: Option A 16. The DBMS ranked as being the "easiest to use" in the text is Oracle Corporation's Oracle. A.True B.False

Answer: Option B 17. Database applications are seldom intended for use by a single user. A.True B.False

Answer: Option B 18. The DBMS ranked as being the "hardest to use" in the text is Microsoft's SQL Server. A.True B.False

Answer: Option B 19. In an Enterprise-class database system, business users interact directly with database applications that interact with the DBMS, which directly accesses the database data. A.True B.False

Answer: Option A Introduction to SQL 1. The condition in a WHERE clause can refer to only one value. Answer: Option B 2. The ADD command is used to enter one row of data or to add multiple rows as a result of a query. A True B.False .

Answer: Option B 3. SQL provides the AS keyword, which can be used to assign meaningful column names to the results of queries using the SQL built-in functions. A True B.False .

Answer: Option A 4. The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries. A True B.False .

Answer: Option A 5. A SELECT statement within another SELECT statement and enclosed in square brackets ([...]) is called a subquery. A True B.False .

Answer: Option B 6. The rows of the result relation produced by a SELECT statement can be sorted, but only by one column. A True B.False .

Answer: Option B 7. There is an equivalent join expression that can be substituted for all subquery expressions. A True B.False .

Answer: Option B 8. A dynamic view is one whose contents materialize when referenced.