Database Application - Software that helps business users interact with database
systems.
Database Administrator - Responsible for securing the database system against
unauthorized users. A database administrator enforces procedures for user access and
database system availability.
Authorization - Many database users should have limited access to specific tables,
columns, or rows of a database. Database systems authorize individual users to access
specific data.
Rules - Database systems ensure data is consistent with structural and business rules.
Query Processor - Interprets queries, creates a plan to modify the database or retrieve
data, and returns query results to the application. Performs query optimization to ensure
the most efficient instructions are executed on the data.
Storage Manager - Translates the query processor instructions into low-level file-system
commands that modify or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
Transaction Manager - Ensures transactions are properly executed. The transaction
manager prevents conflicts between concurrent transactions. The transaction manager
also restores the database to a consistent state in the event of a transaction or system
failure.
Metadata - Data about the database, such as column names and the number of rows in
each table.
Relational Database - Stores data in tables, columns, and rows, similar to a
spreadsheet.
Relational Database - All _________ ________ systems support the SQL query
language.
Relational Database - Relational systems are ideal for databases that require an
accurate record of every transaction, such as banking, airline reservation systems, and
student records.
MongoDB (NoSQL) - The newer non-relational systems are called NoSQL, for 'not only
SQL', and are optimized for big data.
, SQL Statements - INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
CREATE TABLE (Statement) - A statement that creates a new table by specifying the
table and column names. Each column is assigned a data type that indicates the format
of column values. Data types can be numeric, textual, or complex.
Data Type - INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database Design) -
This phase specifies database requirements without regard to a specific database
system. Requirements are represented as entities, relationships, and attributes. An
entity is a person, place, activity, or thing. A relationship is a link between entities, and
an attribute is a descriptive property of an entity.
Logical Design (Database Design) - This phase implements database requirements in a
specific database system. For relational database systems, _________ design converts
entities, relationships, and attributes into tables, keys, and columns.
Physical Design - Specifies indexes, table structures, and partitions. This phase adds
indexes and specifies how tables are organized on storage media. Affects query
processing speed but never affects the query result.
Data Independence - Allows database designers to tune query performance without
changes to application programs.
Application Programming Interface (API) - To simplify the use of SQL with a general-
purpose language, database programs typically use an ____________ _____________
_______________.
MySQL Command-Line Client - A text interface included in the MySQL Server
download.
MySQL - 'World' database, a database that is usually installed with ______.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller VasilyKichigin. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.48. You're not tied to anything after your purchase.
