WGU C170 - Data Management
Applications
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? - ✔✔Many-to-many
Which two examples are attributes? - ✔✔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? - ✔✔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(100) NULL,
street VARCHAR(50) NULL,
city VARCHAR(50) NULL,
state VARCHAR(2) NULL,
zip VARCHAR(10) NULL,
phone VARCHAR(20) NULL,
interests VARCHAR(255) NULL
);
, Which two columns are created as something other than variable-length strings in this statement? -
✔✔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 Street
13411 William 354 Center Avenue
13987 Christopher 354 Center Avenue
13998 Matthew 54123 Main Street
This database table has ten different employee numbers in the first column. Employee_ID is the
primary key. In addition, it has ten different names in the second column and two office addresses
repeated five times each in the third column.
Which action should be used to translate this data into third normal form? - ✔✔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? - ✔✔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
When a product is deleted from the product table, all corresponding rows for the product in the
pricing table are deleted automatically as well.
Applications
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? - ✔✔Many-to-many
Which two examples are attributes? - ✔✔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? - ✔✔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(100) NULL,
street VARCHAR(50) NULL,
city VARCHAR(50) NULL,
state VARCHAR(2) NULL,
zip VARCHAR(10) NULL,
phone VARCHAR(20) NULL,
interests VARCHAR(255) NULL
);
, Which two columns are created as something other than variable-length strings in this statement? -
✔✔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 Street
13411 William 354 Center Avenue
13987 Christopher 354 Center Avenue
13998 Matthew 54123 Main Street
This database table has ten different employee numbers in the first column. Employee_ID is the
primary key. In addition, it has ten different names in the second column and two office addresses
repeated five times each in the third column.
Which action should be used to translate this data into third normal form? - ✔✔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? - ✔✔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
When a product is deleted from the product table, all corresponding rows for the product in the
pricing table are deleted automatically as well.
