A salesperson is authorized to sell many products and a product can be sold by many salespersons.
Which kind of binary relationship does this scenario describe?
One-to-one
One-to-many
Many-to-many
One-to-one binary
Many-to-many
Which two examples are attributes?
Choose 2 answers
A person attending a meeting
An employee number
A sales meeting
A meeting code
An employee number
A meeting code
Which delete rule sets column values in a child table to a missing value when the matching data is deleted from the parent table?
Restrict
Cascade
Matching
Set-to-Null
Set-to-Null
Refer to the given SQL statement.
CREATE TABLE member
(
member_id INT UNSIGNED NOT NULL AUTO_INCREMENT,
PRIMARY KEY (member_id),
last_name VARCHAR(20) NOT NULL,
first_name VARCHAR(20) NOT NULL,
suffix VARCHAR(5) NULL,
expiration DATE NULL,
email VARCHAR(1
member_id
expiration
Employee_ID Employee_Name Office_Address
12342 Jacob 54123 Main Street
12346 Michael 354 Center Avenue
12846 Ethan 54123 Main Street
12887 Joshua 54123 Main Street
12894 Daniel 354 Center Avenue
13097 Alexander 354 Center Avenue
13112 Anthony 54123 Main S
Move the data from the third column into its own table.
A database manager starts to convert data that has been normalized into a form that conforms to the relational model. A simple primary key has been established and all the repeating groups have been deleted.
In which form is this data?
First normal form
S
Second normal form
Two attributes in two related tables have the exact same domain of values. The attribute is a primary key in one table.
Which kind of key is the attribute in the other table?
Foreign
Primary
Compound
Composite
Foreign
When a product is deleted from the product table, all corresponding rows for the product in the pricing table are deleted automatically as well.
What is this referential integrity technique called?
Foreign key constraint
Referential delete
Cascaded delete
Cascaded delete
Refer to the given information.
CREATE TABLE 'test1' (
contact_id INT(10),
name VARCHAR(10),
event_id INT(5),
Which command should be added to the end to make the event_id attribute the primary key within a CREATE TABLE statement?
PRIMARY KEY = event_id);
PRIMARY KEY (event_id));
What does the clause PRIMARY KEY followed by a field name in parentheses mean in a CREATE TABLE statement?
The primary key value, in parentheses, can be used by a column.
The column, in parentheses, is the primary key for the table.
The foreign key, in pa
The column, in parentheses, is the primary key for the table.
Which statement should be used so that it assigns a foreign key to the customer name?
FOREIGN KEY ( customer_name ) REFERENCES table_name ( customer_name )
FOREIGN KEY = customer_name REFERENCES table_name ( customer_name )
FOREIGN KEY ( customer_name ) (
FOREIGN KEY ( customer_name ) REFERENCES table_name ( customer_name )
Which command creates a database only if it does not already exist?
IF NOT EXISTS db_name ;
CREATE DATABASE IF NEW db_name ;
CREATE DATABASE IF NOT EXISTS db_name ;
IF NOT EXISTS CREATE DATABASE db_name ;
IF NOT EXISTS CREATE DATABASE db_name ;
Refer to the given SQL statement.
SELECT PRODNUM, PRODNAME
FROM PRODUCT
Which line should be added to the end of the statement to return the product numbers and product names for products that cost 20 dollars?
WHERE PRODCOST=20;
AND PRODCOST=20;
WHERE PRO
WHERE PRODCOST=20;
What does WHERE identify in a basic SQL SELECT statement?
The associative entity
The rows to be included
A table's intersection data
A range of included columns
The rows to be included
Refer to the given SQL statement.
SELECT EMPNUM
FROM EMPLOYEE
Which line added to the end of the statement returns employee numbers of at least 1000?
WHERE EMPNUM = 1000+;
WHERE EMPNUM > 1000;
WHERE EMPNUM => 1000;
WHERE EMPNUM >= 1000;
WHERE EMPNUM >= 1000;
Refer to the given SQL statement.
SELECT PRODNUM, SUM(QUANTITY)
FROM SALESPERSON
Which line, when added to the end of the statement, returns the total number of each kind of product by product number?
SUM PRODNUM;
COUNT PRODNUM;
ORDER BY PRODNUM;
GROUP BY
GROUP BY PRODNUM;
Which data definition language statement affects databases or objects in them?
SELECT
INSERT
ALTER
NULL
ALTER
What does the DELETE statement do?
It removes views.
It removes rows from a table.
It removes columns from a table.
It removes columns not named in the column list.
It removes rows from a table.
Which condition must be in effect to use the INSERT INTO ... VALUES syntax for an INSERT statement?
The VALUES list must contain a value for each non-null valued column in the table.
The VALUES list must contain a value for each row in the table.
The INSE
The VALUES list must contain a value for each non-null valued column in the table.
Refer to the given SQL statement.
CREATE TABLE mytbl
(
f FLOAT(10,4),
c CHAR(15) NOT NULL DEFAULT 'none',
i TINYINT UNSIGNED NULL
);
Which kind of data type is FLOAT in this statement?
Decimal
Integer
String
Data
Decimal
Which two SQL data types can represent images or sounds?
Choose 2 answers
INT
FLOAT
BINARY
TERNARY
TINYBLOB
SOUNDBLOB
BINARY
TINYBLOB
Refer to the given SQL statement.
CREATE TABLE CUSTOMER
(CustomerID INT NOT NULL AUTO_INCREMENT,
LastName VARCHAR(100) NOT NULL,
FirstName VARCHAR(100) NOT NULL,
PRIMARY KEY ( CustomerID ));
Which component of the command indicates the table's name?
TABLE
CUSTOMER
Which method creates an empty copy of a table and then populates it from the original table?
INSERT TABLE ... SELECT followed by INSERT INTO ... LIKE :
CREATE TABLE ... LIKE followed by INSERT INTO ... SELECT :
CREATE TABLE ... INTO followed by INSERT INT
CREATE TABLE ... LIKE followed by INSERT INTO ... SELECT :
Refer to the given SQL syntax.
ALTER TABLE tbl_name action [, action ] ... ;
What does this syntax allow?
Choose 2 answers
Adding rows
Dropping indexes
Changing storage space
Changing column data types
Dropping indexes
Changing column data types
Which command eliminates a table?
TRUNCATE TABLE
DELETE TABLE
REMOVE TABLE
DROP TABLE
DROP TABLE
Why is a view used to give controlled access to data?
To add complexity to encryption techniques
To move complicated security routines to subqueries
To restrict access to persons retrieving and modifying sensitive information
To limit many-to-many relatio
To restrict access to persons retrieving and modifying sensitive information
Which ALTER TABLE statement adds a foreign key constraint to a child table?
ALTER TABLE child
ADD FOREIGN KEY (par_id) REFERENCES parent (par_id) ON DELETE CASCADE;
ALTER TABLE child
ADD FOREIGN KEY (par_id) WHERE parent (par_id) ON DELETE CASCADE;
ALTER
ALTER TABLE child
ADD FOREIGN KEY (par_id) ON DELETE CASCADE;
A database administrator tries to delete a row in a parent table, but the delete fails because a row in another table depends on that row.
Which referential-integrity rule is in effect?
The default delete rule
The restrict delete rule
The cascade delete r
The restrict delete rule
A manager deletes the BUILDING_MANAGEMENT row in a DEPARTMENT table. Deleting the row also deletes the GARDENING_TEAM and CLEANING_TEAM rows from the referenced PERSONNEL_TEAMS table.
Which referential-integrity rule is in effect?
The default delete rule
The cascade delete rule
Refer to the given SQL statement.
INSERT INTO student VALUES('John','S',NULL),('Mary','S',NULL);
What do the parentheses denote?
The data to be duplicated
The attributes that are changeable
The row values for two individual columns
The column values for t
The column values for two individual rows
What happens in an UPDATE statement if the WHERE clause is omitted?
Only the first row in the table is updated.
Every column in the table is updated.
Every row in the table is updated.
Returns an error.
Every row in the table is updated.
Which action deletes all rows from a table?
Omitting the WHERE clause from a DELETE statement
Adding an ALL statement to a DELETE statement
Omitting the table name in a DELETE statement
Adding an asterisk to a DELETE statement
Omitting the WHERE clause from a DELETE statement
What is the purpose of using a SELECT statement?
To retrieve data
To update data
To delete data
To index data
To retrieve data
Which SQL statement retrieves all of the columns from the Owners table?
SELECT * FROM Owners;
SELECT ALL FROM Owners;
RETRIEVE COMPLETE FROM Owners;
RETRIEVE ALL COLUMNS FROM Owners;
SELECT * FROM Owners;
Which SQL statement tallies the number of different cities in which record companies have been founded?
SELECT COUNT(DISTINCT city) FROM recordcompany;
GROUP BY *(DISTINCT city) FROM recordcompany;
SELECT DISTINCT city FROM recordcompany;
GROUP BY(city) F
SELECT COUNT(DISTINCT city) FROM recordcompany;
Which task does ORDER BY perform by default?
Sorting rows in ascending order
Sorting rows in descending order
Sorting columns in ascending order
Sorting columns in descending order
Sorting columns in descending order
A database administrator of a movie rental company needs to compile a list of movies released each year for a marketing campaign.
Which SQL command will accomplish this?
SELECT MOVIE, YEAR FROM MOVIE BY TITLE;
SELECT MOVIE, TOTAL FROM MOVIE BY TITLE;
SELE
SELECT YEAR, TITLE FROM MOVIE GROUP BY YEAR;
A database manager plans to create a view of a table and has these two elements:
� The CREATE VIEW privilege for the table
� A level of privilege for every column selected by the SELECT
What else does the manager need to create this view?
The values creat
The SELECT privilege for every column referred to elsewhere in the statement
Refer to the given SQL statement.
SELECT product_name, product_number, mfg_city FROM product;
Which statement, when added before this statement, generates a view?
VIEW viewprod:
ALTER viewprod AS
WHERE VIEW viewprod IS
CREATE VIEW viewprod AS
CREATE VIEW viewprod AS
What is the proper command to change a view?
ALTER VIEW
CHANGE VIEW
MODIFY VIEW
UPDATE VIEW
ALTER VIEW
Refer to the given statement.
DROP VIEW EMPLOYEE;
What happens as a result of the execution of this statement to the HRDB table on which the EMPLOYEE view is based?
The data is discarded.
The view is discarded.
The viewing of data is prohibited.
Unauthori
The view is discarded.
How does Table 2 affect the returned results from Table 1 in a left join?
Records are dropped from the results where a match is found between Table 1 and Table 2.
All Table 1 results are returned, regardless of whether a match is found in Table 2.
Results
All Table 1 results are returned, regardless of whether a match is found in Table 2.
Which command functions as a RIGHT JOIN with the roles of the tables reversed?
INNER JOIN
OUTER JOIN
LEFT JOIN
FULL JOIN
LEFT JOIN
Refer to the given SQL statement.
SELECT t1.
, t2.
FROM t1 LEFT JOIN t2 ON t1.i1 = t2.i2
What does the LEFT JOIN statement do?
It selects the rows in Table 1 numbered the same as Table 2.
It selects only the rows in Table 1 that are the same as Table 2.
I
It selects all of the rows in Table 1 and the matching rows in Table 2.
What is the difference between COUNT(*) and COUNT(col_name) for specified column names?
COUNT(*) counts every column selected, and COUNT(col_name) counts only columns with alphabetical names.
COUNT(*) counts every column selected, and COUNT(col_name) coun
COUNT(*) counts every row selected, and COUNT(col_name) counts only non-null values.
Which function determines the total value for a column?
ALL()
SUM()
TOTAL()
SUMMARY()
SUM()
How does a row subquery differ from a table subquery?
A row subquery returns a table with two rows in two columns.
A row subquery returns multiple rows of one or more values.
A row subquery returns a table with one row in one column.
A row subquery return
A row subquery returns a single row of one or more values.
Refer to the given SQL statement.
1. SELECT SPNAME
2. FROM SALESPERSON
3. WHERE SPNUM=
4. FROM CUSTOMER
5. WHERE CUSTNUM=20900);
What is missing from the subquery at the beginning of line 4?
(SPNUM
(FIND SPNUM
(SELECT SPNUM
(SUBQUERY SPNUM
(SELECT SPNUM
Refer to the diagram of an index table.
Salesperson Table
Record
Address Salesperson
Number Salesperson
Name City
Hire Date
Commission
Rate
1 119 Taylor, A New York 1/21/01 20%
2 137 Baker, B Detroit 2/3/11 10%
3 186 Adams, A Dallas 8/23/96 5%
4 204 Dicke
ALTER TABLE `Salesperson` ADD INDEX 'city_index' (`city`)
What is the name of the special internal database where the query optimizer finds information?
Join catalog
Query catalog
Optimizer catalog
Relational catalog
Relational catalog
Which clause in a CREATE TABLE statement creates an index on a field?
INDEX index_rows (index_name)
INDEX index_name (index_rows)
INDEX index_columns (index_name)
INDEX index_name (index_columns)
INDEX index_name (index_columns)
A database administrator needs to modify an index on the CUSTOMER table called IDX_NAME because there are multiple customers with the same name. It has been determined that it would be desirable to modify the index to also include the telephone number.
Wh
ALTER INDEX IDX_NAME ON CUSTOMER(NAME, TELEPHONE);
Which syntax is the correct way to use the DROP INDEX command to drop a primary key from a table?
DROP INDEX PRIMARY KEY tbl_name;
DROP INDEX `PRIMARY` ON tbl_name ;
DROP INDEX `PRIMARY KEY` ON tbl_name;
DROP INDEX WHERE PRIMARY KEY = tbl_name ;
DROP INDEX `PRIMARY` ON tbl_name ;