Data Management Foundations

Which requirement within large, complex databases ensures users have limited access to the database?

Authorization

Which design type specifies database requirements without regard to a specific database system?

Conceptual design

What characterizes the rules of relational databases?

They are logical constraints that ensure the data is valid.

Which event will result in an error code and error description when using MySQL Server?

When an SQL statement is syntactically incorrect

Which data type should be used to store whole integer values, such as age?

INT

Which text-based interface is included in the MySQL Server Download?

MySQL Command-Line Client

Which database system includes the World database during its installation?

MySQL

What is the standardized language of relational database systems?

Structured Query Language

Which SQL sublanguage is used to manage database access?

Data Control Language (DCL)

Which SQL sublanguage is used to roll back database changes?

Data Transaction Language (DTL)

Which format is used by the TIME data type in MySQL?

hh:mm:ss

Which MySQL operator is the last in the order of operator precedence?

OR

Which operator is used to compare columns from the left and right tables in MySQL?

=

Which type of join combines two tables without comparing columns?

CROSS

Which type of join compares columns using only the = operator?

Equijoin

Which type of join is demonstrated by the following query?
 
SELECT Dog.Nickname, Kennel.Address
FROM Dog, Kennel
WHERE Dog.KennelID = Kennel.ID

EQUIJOIN

What is another name for a subquery?

Nested query

Which operator is used to compare against a list of values when determining a match in a WHERE clause?

IN

Which wildcard character is used to represent zero or more characters when searching for a specified pattern using a LIKE operator?

%

Which function is considered an aggregating function in SQL?

MIN

Which clause or function is used with aggregate functions to produce summary rows?

GROUP BY

Which type of join returns only the matching values when selecting rows from two or more tables?

Inner Join

Which join type selects only matching left and right table rows?

Inner Join

Which phrase refers to the view in which data is persisted and is automatically changed as the underlying data is changed?

Materialized View

Which SQL command uses the correct syntax to update the salary of an employee in the Employee table?

UPDATE Employee SET Salary = 50000 WHERE ID = 1;

What describes elements such as column name and data type?

Metadata

Which term identifies an ordered collection of elements enclosed in parenthesis in a tablespace?

Tuple

Which SQL command uses the correct syntax to select the name and salary columns from the Employee table, where the salary is greater than 50000, and sort the results by salary in descending order?

SELECT name, salary FROM Employee WHERE salary > 50000 ORDER BY salary DESC;

Which INSERT statement demonstrates valid syntax in SQL?

INSERT INTO table_name (column1, column2) VALUES (value1, value2);

Which UPDATE statement uses valid syntax in SQL?

UPDATE table_name SET column1 = value1, column2 = value2 WHERE condition;

Which statement used to remove data from temporary tables?

TRUNCATE

Which keyword is a DDL (data definition language) keyword in SQL?

CREATE

Which property is enforced by a primary key field?

Not Null

Which property or function allows SQL to insert a field value?

Auto-increment

Which property specifies an expression on one or more columns of a table?

CHECK

Which type of key is a single column in a table used to identify a row?

Simple primary key

Which type of key is often represented by parentheses to show multiple columns?

Composite

Which primary key characteristic means it includes information that is easy to type and store?

Simple

Which part of a junction table in a relational database establishes a many-to-many relationship between two tables?

Foreign key

Which type of relationship is established by a foreign key in a relational database? 

One-to-many

Which statements may be rejected when a foreign key constraint is specified? 

INSERT

Which key describes the unique columns in a table that do not contain a primary key? 

Candidate key

Which type of development activity is used to convert an entity-relationship model (ERM) into tables, columns, and keys?

Logical design

Which term addresses columns of A being a subset of the columns of B, with A always depending on B? 

Trivial dependency

Which term describes the process of denormalization?

Merging tables

A database designer is working with a table that has a primary key and no duplicate rows.

What can be concluded about the table?

It is a first normal form table.

Which process eliminates redundancy by decomposing a table into two or more tables in a higher normal form?

Normalization

Which term describes the optimal normal form for frequent inserts, updates, and deletes of data? 

Boyce-Codd normal form

Which relationship is depicted in the following entity-relationship (ER) diagram?

One-to-many

Which relationship or association exists between a supertype entity and its subtype entities? 

IsA relationship

Which symbol is used in an entity-relationship (ER) diagram for an entity?

Square

Which symbol is used in an entity-relationship (ER) diagram to indicate an attribute?

Circle

What must be done before creating supertype and subtype entities?

Identify entities.

Which real-world object can be distinctly identified and grouped, such as all employees in a company?

Entity

Which item in an entity-relationship (ER) diagram follows the attribute name and is placed outside of parentheses?

Attribute maximum

Which strategy can be used to identify primary keys when investigating data relationships? 

Unique identifier analysis

How should an entity relationship phrase be read to correctly understand how one entity relates to another entity in an entity-relationship diagram (ER diagram)?

In the direction the relationship verb is facing

Which index stores column values and row pointers in a hierarchy?

Multi-level index

Which type of index refers to entries that are assigned to buckets?

Hash index

Which type of index is a grid of bits where each index row corresponds to a unique row in a table?

Bitmap index