Deck 7: Introduction to Structured Query Language Sql

Question 1

The ANSI SQL standards are also accepted by the ISO.

Answer 1

True

Question 2

If you have not yet used the COMMIT command to store the changes permanently in the database, you can restore the database to its previous condition with the ROLLBACK command.

Answer 2

True

Question 3

SQL requires the use of the ADD command to enter data into a table.

Answer 3

False

Question 4

Any changes made to the contents of a table are not physically saved on disk until you use the SAVE command.

Question 5

A database language enables the user to perform complex queries designed to transform the raw data into useful information.

Question 6

You cannot insert a row containing a null attribute value using SQL.

Question 7

Only numeric data types can be added and subtracted in SQL.

Question 8

Although SQL commands can be grouped together on a single line, complex command sequences are best shown on separate lines, with space between the SQL command and the command's components.

Question 9

The CHECK constraint is used to define a condition for the values that the attribute domain cannot have.

Question 10

Mathematical operators cannot be used to place restrictions on character-based attributes.

Question 11

To list the contents of a table, you must use the DISPLAY command.

Question 12

Entity integrity is enforced automatically when the primary key is specified in the CREATE TABLE command sequence.

Question 13

All SQL commands must be issued on a single line.

Question 14

The COMMIT command does not permanently save all changes. In order to do that, you must use SAVE.

Question 15

A database language enables the user to create database and table structures to perform basic data management chores.

Question 16

You can select partial table contents by naming the desired fields and by placing restrictions on the rows to be included in the output.

Question 17

Data type selection is usually dictated by the nature of the data and by the intended use.

Question 18

The ANSI prescribes a standard SQL-the current fully approved version is known as SQL-07.

Question 19

Oracle users can use the Access QBE (query by example) query generator.

Question 20

SQL is considered difficult to learn; its command set has a vocabulary of more than 300 words.

Question 21

The SQL command that modifies an attribute's values in one or more table's rows is _____.

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

Question 22

SQL allows the use of logical restrictions on its inquiries such as OR, AND, and NOT.

Question 23

An example of a command a user would use when making changes to a PRODUCT table is .

A) CHANGE PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
B) ROLLBACK PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
C) EDIT PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
D) UPDATE PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';

Question 24

String comparisons are made from left to right.

Question 25

The SQL command that allows a user to insert rows into a table is .

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

Question 26

An alias cannot be used when a table is required to be joined to itself in a recursive query.

Question 27

UPDATE tablename *****
[WHERE conditionlist];
The command replaces the ***** in the syntax of the UPDATE command, shown above.

A) SET columnname = expression
B) columnname = expression
C) expression = columnname
D) LET columnname = expression

Question 28

The SQL command that allows a user to permanently save data changes is .

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

Question 29

Most SQL implementations yield case-insensitive searches.

Question 30

The COUNT function is designed to tally the number of non-null "values" of an attribute, and is often used in conjunction with the DISTINCT clause.

Question 31

Date procedures are often more software-specific than other SQL procedures.

Question 32

The conditional LIKE must be used in conjunction with wildcard characters.

Question 33

When joining three or more tables, you need to specify a join condition for one pair of tables.

Question 34

Some RDBMSs, such as Microsoft Access, automatically make the necessary conversions to eliminate case sensitivity.

Question 35

In Oracle, the command is used to change the display for a column, for example, to place a $ in front of a numeric value.

A) DISPLAY
B) FORMAT
C) CHAR
D) CONVERT

Question 36

To list all the contents of the PRODUCT table, a user would use .

A) LIST * FROM PRODUCT
B) SELECT * FROM PRODUCT
C) DISPLAY * FROM PRODUCT
D) SELECT ALL FROM PRODUCT

Question 37

The SQL command that allows a user to list the contents of a table is .

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

Question 38

The current fully approved version of standard SQL prescribed by the ANSI is .

A) SQL-99
B) SQL-2003
C) SQL-4
D) SQL-07

Question 39

The data format for SQL character is .

A) CHAR and VARCHAR
B) VARCHAR only
C) alphanumeric
D) CHAR only

Question 40

ANSI-standard SQL allows the use of special operators in conjunction with the WHERE clause.

Question 41

Which of the following queries will output the table contents when the value of the character field P_CODE is alphabetically less than 1558-QW1?

A) SELECT P_CODE, P_DESCRIPT, P_QOH, P_MIN, P_PRICE FROM PRODUCT WHERE P_CODE <'1558-QW1';
B) SELECT P_CODE, P_DESCRIPT, P_QOH, P_MIN, P_PRICE FROM PRODUCT WHERE P_CODE = [1558-QW1];
C) SELECT P_CODE, P_DESCRIPT, P_QOH, P_MIN, P_PRICE FROM PRODUCT WHERE P_CODE = (1558-QW1);
D) SELECT P_CODE, P_DESCRIPT, P_QOH, P_MIN, P_PRICE FROM PRODUCT WHERE P_CODE = {1558-QW1};

Question 42

A(n) is an alternate name given to a column or table in any SQL statement.

A) alias
B) data type
C) stored function
D) trigger

Question 43

Which of the following queries will list all the rows in which the inventory stock dates occur on or after January 20, 2010?

A) SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDATE >= '20-JAN-2010';
B) SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDATE >= $20-JAN-2010$;
C) SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDATE <= '20-JAN-2010';
D) SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDATE >= {20-JAN-2010};

Question 44

Which of the following queries will output the table contents when the value of V_CODE is not equal to 21344?

A) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <> 21344;
B) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <= 21344;
C) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344;
D) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE => 21344;

Question 45

The special operator used to check whether an attribute value is within a range of values is .

A) BETWEEN
B) NULL
C) LIKE
D) IN

Question 46

The special operator used to check whether a subquery returns any rows is .

A) BETWEEN
B) EXISTS
C) LIKE
D) IN

Question 47

When a user issues the DELETE FROM tablename command without specifying a WHERE condition, .

A) no rows will be deleted
B) the first row will be deleted
C) the last row will be deleted
D) all rows will be deleted

Question 48

Which of the following queries will use the given columns and column aliases from the PRODUCT table to determine the total value of inventory held on hand and display the results in a column labeled TOTVALUE?

A) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH*P_PRICE AS TOTVALUE FROM PRODUCT;
B) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH=P_PRICE AS TOTVALUE FROM PRODUCT;
C) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH/P_PRICE AS TOTVALUE FROM PRODUCT;
D) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH-P_PRICE AS TOTVALUE FROM PRODUCT;

Question 49

Which of the following is used to select partial table contents?

A) SELECT FROM BY ;
B) LIST FROM BY ;
C) SELECT FROM WHERE ;
D) LIST FROM WHERE ;

Question 50

Which of the following queries uses the correct SQL syntax to list the table contents for either V_CODE = 21344 or V_CODE = 24288?

A) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE <= 24288;
B) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE => 24288;
C) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE > 24288;
D) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE = 24288;

Question 51

The command is used to restore the database to its previous condition.

A) COMMIT; RESTORE;
B) COMMIT; BACKUP;
C) COMMIT; ROLLBACK;
D) ROLLBACK;

Question 52

The command would be used to delete the table row where the P_CODE is 'BRT-345'.

A) DELETE FROM PRODUCT WHERE P_CODE = 'BRT-345';
B) REMOVE FROM PRODUCT WHERE P_CODE = 'BRT-345';
C) ERASE FROM PRODUCT WHERE P_CODE = 'BRT-345';
D) ROLLBACK FROM PRODUCT WHERE P_CODE = 'BRT-345';

Question 53

Which of the following queries will output the table contents when the value of V_CODE is equal to 21344?

A) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <> 21344;
B) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <= 21344;
C) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344;
D) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE => 21344;

Question 54

Which of the following queries will output the table contents when the value of P_PRICE is less than or equal to 10?

A) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE <> 10;
B) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE <= 10;
C) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE => 10;
D) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE = 10;

Question 55

The special operator is used to check whether an attribute value is null.

A) BETWEEN
B) IS NULL
C) LIKE
D) NOT NULL

Question 56

The special operator used to check whether an attribute value matches a given string pattern is .

A) BETWEEN
B) IS NULL
C) LIKE
D) IN

Question 57

A(n) is a query that is embedded (or nested) inside another query.

A) alias
B) operator
C) subquery
D) view

Question 58

To remove a row from the PRODUCT table, one must use the command.

A) COMMIT
B) DELETE
C) ERASE
D) KILL

Question 59

Some RDBMSs, such as Oracle, automatically data changes when issuing data definition commands.

A) COMMIT
B) ROLLBACK
C) UNSAVE
D) UPDATE

Question 60

Which of the following queries will use the given columns and column aliases from the PRODUCT table to determine the total value of inventory held on hand?

A) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH/P_PRICE FROM PRODUCT;
B) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH=P_PRICE FROM PRODUCT;
C) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH*P_PRICE FROM PRODUCT;
D) SELECT P_DESCRIPT, P_QOH, P_PRICE, P_QOH-P_PRICE FROM PRODUCT;

Question 61

A(n) is a logical group of database objects, such as tables and indexes, that are related to each other.

Question 62

The syntax for creating an index is .

A) CREATE [NOT NULL] INDEX indexname FROM viewname(column1 [, column2]);
B) CREATE [UNIQUE] INDEX indexname ON tablename( column1 [, column2]);
C) CREATE [UNIQUE] INDEX indexname FROM tablename(column1 [, column2]);
D) CREATE [DEFAULT] INDEX indexname ON viewname(column1 [, column2]);

Question 63

The basic SQL vocabulary has fewer than words.

Question 64

The query to join the P_DESCRIPT and P_PRICE fields from the PRODUCT table and the V_NAME, V_AREACODE, V_PHONE, and V_CONTACT fields from the VENDOR table where the values of V_CODE match is .

A) SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <> VENDOR.V_CODE;
B) SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE = VENDOR.V_CODE;
C) SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <= VENDOR.V_CODE;
D) SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE => VENDOR.V_CODE;

Question 65

The query used to list the P_CODE, P_DESCRIPT, P_INDATE, and P_PRICE fields from the PRODUCT table in ascending order by P_PRICE is .

A) SELECT P_CODE, P_DESCRIPT, P_INDATE, P_PRICE FROM PRODUCT SEQUENCE BY P_PRICE;
B) SELECT P_CODE, P_DESCRIPT, P_INDATE, P_PRICE FROM PRODUCT LIST BY P_PRICE;
C) SELECT P_CODE, P_DESCRIPT, P_INDATE, P_PRICE FROM PRODUCT ORDER BY P_PRICE;
D) SELECT P_CODE, P_DESCRIPT, P_INDATE, P_PRICE FROM PRODUCT ASCENDING BY P_PRICE;

Question 66

Which of the following queries is used to list a unique value for V_CODE, where the list will produce only a list of those values that are different from one another?

A) SELECT ONLY V_CODE FROM PRODUCT;
B) SELECT UNIQUE V_CODE FROM PRODUCT;
C) SELECT DIFFERENT V_CODE FROM PRODUCT;
D) SELECT DISTINCT V_CODE FROM PRODUCT;

Question 67

The SQL data manipulation command HAVING:

A) restricts the selection of rows based on a conditional expression.
B) restricts the selection of grouped rows based on a condition.
C) modifies an attribute's values in one or more table's rows.
D) groups the selected rows based on one or more attributes.

Question 68

The constraint assigns a value to an attribute when a new row is added to a table.

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

Question 69

The command is used with the ALTER TABLE command to modify the table by deleting a column.

A) DROP
B) REMOVE
C) DELETE
D) ERASE

Question 70

The SQL aggregate function that gives the number of rows containing non-null values for a given column is

A) COUNT
B) MIN
C) MAX
D) SUM

Question 71

The query to join the P_DESCRIPT and P_PRICE fields from the PRODUCT table and the V_NAME, V_AREACODE, V_PHONE and V_CONTACT fields from the VENDOR table, where the values of V_CODE match and the output is ordered by the price is .

A) SELECT PRODUCT.P_DESCRIPT, PRODUCT.P_PRICE, VENDOR.V_NAME, VENDOR.V_CONTACT, VENDOR.V_AREACODE, VENDOR.V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <> VENDOR.V_CODE; ORDER BY PRODUCT.P_PRICE;
B) SELECT PRODUCT.P_DESCRIPT, PRODUCT.P_PRICE, VENDOR.V_NAME, VENDOR.V_CONTACT, VENDOR.V_AREACODE, VENDOR.V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE => VENDOR.V_CODE; ORDER BY PRODUCT.P_PRICE;
C) SELECT PRODUCT.P_DESCRIPT, PRODUCT.P_PRICE, VENDOR.V_NAME, VENDOR.V_CONTACT, VENDOR.V_AREACODE, VENDOR.V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <= VENDOR.V_CODE; ORDER BY PRODUCT.P_PRICE;
D) SELECT PRODUCT.P_DESCRIPT, PRODUCT.P_PRICE, VENDOR.V_NAME, VENDOR.V_CONTACT, VENDOR.V_AREACODE, VENDOR.V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE = VENDOR.V_CODE; ORDER BY PRODUCT.P_PRICE;

Question 72

With the exception of the database process, most RDBMS vendors use SQL that deviates little from the ANSI standard SQL.

Question 73

A table can be deleted from the database by using the command.

A) DROP TABLE
B) DELETE TABLE
C) MODIFY TABLE
D) ERASE TABLE

Question 74

The SQL aggregate function that gives the arithmetic mean for a specific column is .

A) COUNT
B) AVG
C) MAX
D) SUM

Question 75

U.S. state abbreviations are always two characters, so (2) is a logical choice for the data type representing a state column.

Question 76

All changes in a table structure are made using the command, followed by a keyword that produces the specific changes a user wants to make.

A) ALTER TABLE
B) UPDATE TABLE
C) COMMIT TABLE
D) ROLLBACK TABLE

Question 77

The SQL aggregate function that gives the total of all values for a selected attribute in a given column is? .

A) COUNT
B) MIN
C) MAX
D) SUM

Question 78

In the SQL environment, the word covers both questions and actions.

Question 79

According to the rules of precedence, which of the following computations should be completed first?

A) Performing additions and subtractions
B) Performing multiplications and divisions
C) Performing operations within parentheses
D) Performing power operations

Question 80

The SQL query to output the contents of the EMPLOYEE table sorted by last name, first name, and initial is _____.

A) SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL, EMP_AREACODE, EMP_PHONE FROM EMPLOYEE LIST BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
B) SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL, EMP_AREACODE, EMP_PHONE FROM EMPLOYEE ORDER BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
C) SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL, EMP_AREACODE, EMP_PHONE FROM EMPLOYEE DISPLAY BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
D) SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL, EMP_AREACODE, EMP_PHONE FROM EMPLOYEE SEQUENCE BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;