Deck 7: SQL for Database Construction and Application Processing

Question 1

If the table ITEM has a column WEIGHT,and WEIGHT has the data type Numeric (4,2),the value 4321 will be displayed by the DBMS as 43.21.

Answer 1

True

Question 2

Data values to be added to a table are specified by using the SQL VALUES clause.

Answer 2

True

Question 3

The SQL keyword CONSTRAINT is used to limit column values to specific values.

Answer 3

True

Question 4

Unless it is being used to copy data from one table to another,the SQL INSERT statement can be used to insert only a single row into a table.

Question 5

If the table PRODUCT has a column PRICE,and PRICE has the data type Numeric (8,2),the value 98765 stored in that field will be displayed by the DBMS as 98765.00.

Question 6

The SQL keyword CONSTRAINT can be used in conjunction with the SQL keywords PRIMARY KEY and FOREIGN KEY.

Question 7

One advantage of using the CONSTRAINT command to define a primary key is that the database designer controls the name of the constraint.

Question 8

When the correct SQL command is used to delete a table's structure,the command can only be used with a table that has already had its data removed.

Question 9

Rows can be removed from a table by using the SQL DELETE statement.

Question 10

The SQL keyword PRIMARY KEY is used to designate the column(s)that are the primary key for the table.

Question 11

The SQL keyword DELETE is used to delete a table's structure.

Question 12

Rows in a table can be changed by using the SQL UPDATE statement.

Question 13

The SQL SET keyword is used to specify a new value when changing a column value.

Question 14

One or more rows can be added to a table by using the SQL INSERT statement.

Question 15

The SQL CREATE TABLE statement is used to name a new table and describe the table's columns.

Question 16

The SQL keyword MODIFY is used to change a column value.

Question 17

The SQL keyword MODIFY is used to change the structure,properties or constraints of a table.

Question 18

The SQL keyword CONSTRAINT is used to define one of several types of constraints.

Question 19

The SQL keyword CHECK is used to limit column values to specific values.

Question 20

The SQL keyword UNIQUE is used to define alternate keys.

Question 21

The SQL command CREATE USER VIEW is used to create a virtual table.

Question 22

Because SQL statements are table-oriented,whereas programs are variable-oriented,the results of SQL statements used in programs are treated as pseudofiles.

Question 23

SQL views are updatable when the view is based on a single table with no computed columns,and all non-null columns are present in the view.

Question 24

SQL views can be used to provide a level of insulation between data processed by applications and the data actually stored in the database tables.

Question 25

A stored program that is attached to a table or view is called a stored procedure.

Question 26

SQL triggers use the ANSI SQL keywords BEFORE,INSTEAD OF,and AFTER.

Question 27

SQL triggers can be used when the DBMS receives an INSERT request.

Question 28

If the values in an SQL view are changeable through the view itself,the SQL command UPDATE is used to change the values.

Question 29

According to the SQL-92 standard,statements used to construct views cannot contain the WHERE clause.

Question 30

A set of SQL statements stored in an application written in a standard programming language is called embedded SQL.

Question 31

SQL triggers are used for providing default values,validity checking,updating views,and performing referential integrity actions.

Question 32

The SQL command SELECT is used to retrieve view instances.

Question 33

The Oracle DBMS supports the SQL BEFORE trigger.

Question 34

The values in an SQL view are not always changeable through the view itself.

Question 35

The values in an SQL view are always changeable through the view itself.

Question 36

SQL views are constructed from SELECT statements.

Question 37

Because SQL statements are table-oriented,whereas programs are variable-oriented,the results of SQL statements used in programs are accessed using an SQL cursor.

Question 38

An SQL virtual table is called a view.

Question 39

SQL triggers can be used with SQL operations INSERT,UPDATE,and DELETE.

Question 40

SQL views can be used to hide columns.

Question 41

SQL triggers are created using the SQL ADD TRIGGER statement.

Question 42

If a trigger is being written to enforce referential integrity actions,you cannot use an INSTEAD OF trigger.

Question 43

When a trigger is fired,the DBMS makes the appropriate data available to the trigger code.

Question 44

A stored program that is stored within the database and compiled when used is called a trigger.

Question 45

Which SQL keyword is used to impose restrictions on a table,data or relationship?

A)SET
B)CREATE
C)SELECT
D)CONSTRAINT

Question 46

If the values in an SQL view are not changeable through the view itself,you may still be able to update the view by using unique application logic.In this case,the specific logic is placed in an INSTEAD OF trigger.

Question 47

The SQL keyword used to limit column values to specific values is ________.

A)CONSTRAINT
B)CHECK
C)NOT NULL
D)UNIQUE

Question 48

Which SQL keyword is used to name a new table and describe the table's columns?

A)SET
B)CREATE
C)SELECT
D)ALTER

Question 49

To set a column value to an initial value that is selected according to some complicated business logic,you would use the SQL DEFAULT constraint with the CREATE TABLE command.

Question 50

The SQL Server DBMS supports the SQL BEFORE trigger.

Question 51

Unlike application code,stored procedures are never distributed to the client computers.

Question 52

Which of the following illustrates the authors' preferred style of defining a primary key?

A)CREATE TABLE CUSTOMER ( CustomerID Integer Primary Key
LastName Char(35) Not Null
First Name Char(25) Null
B)CREATE TABLE CUSTOMER ( CustomerID Integer Not Null
LastName Char(35) Not Null
First Name Char(25) Null
CONSTRAINT CustomerPK PRIMARY KEY (CustomerID)
C)CREATE TABLE CUSTOMER ( CustomerID Integer Not Null
LastName Char(35) Not Null
First Name Char(25) Null
);
ALTER TABLE CUSTOMER
ADD CONSTRAINT CustomerPK PRIMARY KEY (CustomerID);
D)Both B and C are correct

Question 53

Stored procedures have the advantage of greater security,decreased network traffic,SQL optimized by the DBMS compiler,and code sharing.

Question 54

If the table PRODUCT has a column PRICE that has the data type Numeric (8,2),the value 12345 will be displayed by the DBMS as ________.

A)123.45
B)12345
C)12345.00
D)123450.00

Question 55

One advantage of using the CONSTRAINT phrase to define a primary key is that the database designer controls the ________.

A)name of the table
B)name of the foreign key field
C)name of the constraint
D)name of the primary key field

Question 56

Which SQL keyword is used to change the structure,properties or constraints of a table?

A)SET
B)CREATE
C)SELECT
D)ALTER

Question 57

Because SQL stored procedures allow and encourage code sharing among developers,stored procedures give database application developers the advantages of less work,standardized processing,and specialization among developers.

Question 58

Given the SQL statement CREATE TABLE SALESREP (
SalesRepNo int NOT NULL,
RepName char(35) NOT NULL,
HireDate date NOT NULL,
CONSTRAINT SalesRepPK PRIMARY KEY (SalesRepNo),
CONSTRAINT SalesRepAK1 UNIQUE (RepName)
);
We know that ________.

A)RepName is the primary key
B)RepName is a foreign key
C)RepName is a candidate key
D)RepName is a surrogate key

Question 59

Which SQL keyword is used to delete a table's structure?

A)DELETE
B)DROP
C)DISPOSE
D)ALTER

Question 60

SQL triggers can be used when the DBMS receives an update request.

Question 61

Which SQL keyword is used to add one or more rows of data to a table?

A)DELETE
B)INSERT
C)SELECT
D)UPDATE

Question 62

According to the SQL-92 standard,statements used to construct views cannot contain ________.

A)the SELECT clause
B)the FROM clause
C)the WHERE clause
D)the ORDER BY clause

Question 63

SQL views are always updatable when ________.

A)the view is based on a single table with no computed columns,and all non-null columns are present in the view
B)the view is based on any number of tables,with or without computed columns,and the INSTEAD OF trigger is defined for the view
C)the view is based on multiple tables,the update is being done on the most subordinate table,and the rows of that table can be uniquely identified
D)Both A and B are correct

Question 64

Because SQL statements are table-oriented,whereas programs are element-oriented,the results of SQL statements used in programs are accessed using ________.

A)standard programming tools
B)custom written programming tools
C)an SQL cursor
D)an SQL trigger

Question 65

Which keyword is used to remove one or more rows from a table?

A)DELETE
B)INSERT
C)ERASE
D)SET

Question 66

A set of SQL statements stored in an application written in a standard programming language is called ________.

A)a stored procedure
B)a view
C)embedded SQL
D)a trigger

Question 67

SQL views are not used ________.

A)to hide columns
B)to show results of computed columns
C)to hide complicated SQL statements
D)to enforce primary key constraints

Question 68

If the values in an SQL view are changeable through the view itself,which SQL statement is used to change the values?

A)CREATE
B)DELETE
C)INSERT
D)UPDATE

Question 69

Which SQL statement is used to retrieve view instances?

A)CREATE
B)DELETE
C)INSERT
D)SELECT

Question 70

A stored program that is attached to a table or view is called ________.

A)a CHECK constraint
B)a view
C)embedded SQL
D)a trigger

Question 71

The SQL command used to create a virtual table is ________.

A)CREATE VTABLE
B)CREATE VIEW
C)VTABLE
D)VIEW

Question 72

An SQL virtual table is called ________.

A)a CHECK constraint
B)a view
C)embedded SQL
D)a trigger

Question 73

Which of the following is not an SQL trigger Oracle supports?

A)BEFORE
B)INSTEAD OF
C)AFTER
D)DURING

Question 74

Because SQL statements are set-oriented,whereas programs are element-oriented,the results of SQL statements used in programs are treated as ________.

A)tables
B)rows
C)files
D)pseudofiles

Question 75

Which SQL keyword is used to change one or more rows in a table?

A)MODIFY
B)INSERT
C)SELECT
D)UPDATE

Question 76

Based on the tables below,which of the following SQL statements would increase the balance of the Gonzales account by $100 to a total of $450? GENERAL SALES DATABASE:
SALESREP
CUSTOMER

A)SELECT Gonzales
FROM CUSTOMER
INSERT VALUES PLUS (100)INTO Balance;
B)SELECT Gonzales
FROM CUSTOMER
INSERT VALUES (450)INTO Balance;
C)INSERT INTO CUSTOMER VALUES (450)
SELECT Balance
WHERE CustName = 'Gonzales';
D)UPDATE CUSTOMER
SET Balance = 450
WHERE CustName = 'Gonzales';

Question 77

When the correct SQL command is used to delete a table's structure,what happens to the data in the table?

A)If the deleted table was a parent table,the data is added to the appropriate rows of the child table.
B)If the deleted table was a child table,the data is added to the appropriate rows of the parent table.
C)The data in the table is also deleted.
D)Nothing because there was no data in the table since only an empty table can be deleted.

Question 78

Which SQL keyword is used to change the values of an entire column?

A)CHANGE
B)INSERT
C)SELECT
D)SET

Question 79

SQL views are constructed from ________.

A)CREATE statements
B)INSERT statements
C)UPDATE statements
D)SELECT statements

Question 80

Which of the following is not an ANSI SQL trigger?

A)BEFORE UPDATE
B)INSTEAD OF UPDATE
C)AFTER INSERT
D)INSTEAD OF CONSTRAINT