Chapter 7

Dynamic SQL: A) is used to generate appropriate SQL code on the fly, as an application is processing. B) is quite volatile. C) is not used widely on the Internet. D) creates a less flexible application.

A

Embedded SQL consists of: A) hard-coded SQL statements included in a program written in another language. B) SQL encapsulated inside of other SQL statements. C) SQL written into a front-end application. D) SQL translated to a lower-level language.

A

In SQL, a(n) ________ subquery is a type of subquery in which processing the inner query depends on data from the outer query. A) correlated B) paired C) natural D) inner

A

The MERGE command: A) allows one to combine the INSERT and UPDATE operations. B) allows one to combine the INSERT and DELETE operations. C) joins 2 tables together. D) none of the above

A

The UNION clause is used to: A) combine the output from multiple queries into a single result table. B) join two tables together to form one table. C) find all rows that do not match in two tables. D) none of the above

A

User-defined transactions can improve system performance because: A) transactions are processed as sets, reducing system overhead. B) transactions are mapped to SQL statements. C) speed is improved due to query optimization. D) all of the above

A

A ________ is a temporary table used in the FROM clause of an SQL query. A) correlated subquery B) derived table C) view table D) none of the above

B

A join operation: A) brings together data from two different fields. B) causes two tables with a common domain to be combined into a single table or view. C) causes two disparate tables to be combined into a single table or view. D) is used to combine indexing operations.

B

A join that is based upon equality between values in two common columns with the same name and where one duplicate column has been removed is called a(n): A) equi-join. B) natural join. C) multivariate join. D) inner join.

B

A type of join where a table is joined to itself is called a(n) ________. A) unary join B) self join C) unnatural join D) pinned join

B

A type of query that is placed within a WHERE or HAVING clause of another query is called a: A) master query. B) subquery. C) superquery. D) multi-query.

B

All of the following are guidelines for better query design EXCEPT: A) Understand how indexes are used in query processing B) Use a lot of self-joins C) Write simple queries D) Retrieve on the data that you need

B

All of the following are new data types added in SQL:200n EXCEPT: A) BIGINT B) BIT C) MULTISET D) XML

B

Explicit commands to manage transactions are needed when: A) a transaction consists of just one SQL command. B) multiple SQL commands must be run as part of a transaction. C) autocommit is set to off. D) none of the above

B

Extensions defined in SQL-99 that include the capability to create and drop modules of code stored in the database schema across user sessions are called: A) stored procedures. B) Persistent Stored Modules. C) flow control modules. D) none of the above

B

In order for two queries to be UNION-compatible, they must: A) both have the same number of lines in their SQL statements. B) both output compatible data types for each column and return the same number of rows. C) both return at least one row. D) all of the above.

B

In order to embed SQL inside of another language, the ________ statement must be placed before the SQL in the host language. A) GET SQL B) EXEC SQL C) RUN SQL D) SQL SQL

B

One major advantage of the outer join is that: A) information is easily accessible. B) information is not lost. C) the query is easier to write. D) all of the above

B

What results would the following SQL statement produce? select owner, table_name from dba_tables where table_name = 'CUSTOMER'; A) A listing of all customers in the customer table B) A listing of the owner of the customer table C) A listing of the owner of the customer table as well as customers D) An error message

B

While triggers run automatically, ________ do not and have to be called. A) trapdoors B) routines C) selects D) updates

B

A join in which rows that do not have matching values in common columns are still included in the result table is called a(n): A) natural join. B) equi-join. C) outer join. D) union join

C

A named set of SQL statements that are considered when a data modification occurs are called: A) stored procedures. B) treatments. C) triggers. D) trapdoors.

C

A type of join implemented in SQL-1999 and by extension SQL-2003 that returns all of the data from each table that is joined is called a(n): A) outer join. B) inner join. C) union join. D) intersect join

C

All of the following are part of the coding structure for triggers EXCEPT: A) event. B) condition. C) selection. D) action.

C

An interactive command that can be used to dynamically control a user session for appropriate integrity measures is: A) rollback. B) rollforward. C) set autocommit. D) expunge.

C

Establishing IF-THEN-ELSE logical processing within an SQL statement can be accomplished by: A) using the if-then-else construct. B) using the immediate if statement. C) using the CASE keyword in a statement. D) using a subquery.

C

In which of the following situations would one have to use an outer join in order to obtain the desired results? A) A report is desired that lists all customers who placed an order. B) A report is desired that lists all customers and the total of their orders. C) A report is desired that lists all customers, the total of their orders during the most recent month, and includes customers who did not place an order during the month (their total will be zero). D) There is never a situation that requires only an outer join.

C

RANK and DENSE-RANK are examples of: A) Ceilings. B) Door Functions. C) Window Functions. D) Moving Functions.

C

SQL-invoked routines can be: A) procedures. B) functions. C) all of the above. D) none of the above.

C

________ differs from array because it can contain duplicates. A) BIGINT B) XML C) MULTISET D) TABLE

C

________ takes a value of true if a subquery returns an intermediate results table which contains one or more rows. A) In B) Having C) Exists D) Extents

C

A join in which the joining condition is based on equality between values in the common columns is called a(n): A) equi-join. B) uni-lateral join. C) natural join. D) both A and C.

D

A new set of analytical functions added in SQL:200n are referred to as: A) OLAF Functions. B) MOLAP Functions. C) Average Functions. D) OLAP Functions.

D

A procedure is: A) stored within the database. B) given a unique name. C) called by name. D) all of the above

D

All of the following are advantages of SQL-invoked routines EXCEPT: A) flexibility. B) efficiency. C) sharability. D) security.

D

If the DBA wishes to describe all tables in the database, which data dictionary view should be accessed in Oracle? A) dba_tab_privs B) dba_tab_comments C) dba_table_label D) dba_tables

D

The most commonly used form of join operation is the: A) outer join. B) union join. C) equi-join. D) natural join.

D

User-defined data types: A) can be a subclass of a standard type. B) can behave as an object. C) can have defined functions and methods. D) can have all of the above.

D