Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Data Management Foundations, D426 > Introduction to DB > Flashcards

Introduction to DB Flashcards

1
Q

What are three ways data can vary?

A

Scope, format, and access

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Describe scope

A

The amount of data produced and collected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe format

A

Data may be produced as numbers, text, image, audio, or video

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe access

A

Some data sources are private while others are public

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a database?

A

a collection of data in a structured format

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a DBMS?

A

database management systems are software for reading and writing into databases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  • What is a query?
A
  • A request to change or retrieve something in the database
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  • What is a query language?
A
  • A special programming language for managing database operations
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  • What is a database application?
A
  • Special software that helps business users intact with databases.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  • What is an information management system?
A
  • Software that manages corporate database for specific business function. Usually includes DBMS, UI, logs, and interfaces to other systems.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  • What is a database administrator?
A
  • Responsible for securing the database systems against unauthorized users
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  • What does a database designer do?
A
  • Makes decisions about the format of data, response times, and support for rules that govern data
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  • What does a database programmer do?
A
  • Integrates database languages and other languages into a program that accesses databases.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  • Describe a database user
A
  • Accesses the data in a database
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  • What are 5 special requirements for large databases to manage?
A
  • Performance, authorization, security, rules, and recovery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  • Describe performance
A
  • Manages response time by structuring data and processing queries correctly
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q
  • Describe authorization
A
  • Authorize individual users to access specific data
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q
  • Describe security
A
  • Authorized users only access permissible data
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q
  • Describe rules
A
  • Ensure data is consistent with structural and business rules
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q
  • Describe recovery
A
  • Database system must be able to recover from a failure without loss of data
21
Q
  • What is a transaction?
A

a group of queries that must be accepted or rejected as a whole

22
Q

What are the three protocols for processing transactions?

A
  • Ensure transactions are processed completely
  • Prevent conflicts between concurrent transactions
  • ensure transactions are logged and never lost.
23
Q
  • Why is it important to ensure transactions are processed completely or not at all?
A
  • Incomplete transactions may lead to errors. In a batch of transactions if one fails, all should fail to avoid this.
24
Q
  • Describe database architecture
A
  • Describes the internal components of a database and how they interface with one another
25
Q
  • Describe the job of a query processor
A
  • Intreprets queries, modifies database, or retrieves data, and returns results
26
Q
  • Describe the job of a storage manager
A
  • Translates the a query into low level file management commands and uses indexes to quickly move data.
27
Q
  • Describe the job of a transaction manager
A
  • Ensures transactions are properly executed by preventing conflicts between concurrent transactions. Can restore database to consistent state after system failure.
28
Q
  • Describe the job of a log
A
  • Documents all inserts, updates, and deletes
29
Q
  • Describe the job of a catalog( or data dictionary)
A
  • The directory of tables, columns, indexes, and other database objects. AKA metadata
30
Q
  • Describe a relational database
A
  • Database organized like a spreadsheet. All data is stored in the same format. Supported by SQL
31
Q
  • What is SQL?
A
  • Structured query language used for reading, writing, and updating relational databases
32
Q
  • How did NoSQL come about? What does it stand for?
A
  • Big data in the 2000s confusing relational databases. Not-only sql
33
Q
  • What does CRUD stand for?
A
  • Create, retrieve, update, delete
34
Q
  • What is an SQL statement?
A
  • a database command (like a query) that inserts, selects, updates or deletes data
35
Q
  • What are four SQL statements?
A
  • INSERT, SELECT, UPDATE, DELETE
36
Q
  • What does the SQL statement CREATE TABLE do?
A
  • Creates a new table
37
Q
  • What are the three data types of relational databases?
A
  • Numbers, textual, and complex
38
Q
  • What are some examples of the data types in relational databases?
A
  • INT stores and integer value, DECIMAL stores a fractional number value, VARCHAR stores a textual value, DATE stores year, month, and day
39
Q
  • What does VARCHAR(10) indicate?
A
  • That the data type will be textual with a length of 10 letters
40
Q
  • What are the three phases of large database design?
A
  • analysis, logical design, and physical design
41
Q
  • What is an entity?
A
  • person, place, activity, or thing
42
Q
  • What is an attribute?
A
  • a descriptive property of an entity
43
Q
  • What is a relationship?
A
  • link between entities
44
Q
  • Describe the logical design phase of relational database design
A
  • Implements database requirements. In relational databases, this means converting entities, relationships, and attributes into tables, keys, and columns.
45
Q
  • Describe the analysis phase of relational database design
A
  • specifies database requirements without regard to a specific system
46
Q
  • Describe the physical design phase of database design
A
  • Adds indexes and specifies how tables are organized on storage media. Will effect query efficiency but not result.
47
Q
  • Describe “data independence”
A
  • The principle that physical design never affects query results
48
Q
  • What is an API?
A
  • application programming interface. I library of procedures that links a host programming language to a database.
49
Q
  • SQL is usually implemented alongside what?
A
  • A programming language

Data Management Foundations, D426 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions