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ISTM 210_ Phinney Exam 4 QUESTIONS AND ANSWERS
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ISTM 210_ Phinney Exam 4 QUESTIONS AND ANSWERS
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ISTM 210: Phinney Exam 4database
well-organized collection of files. consisting of tables, reports, queries, and forms.
table
An arrangement of data made up of horizontal rows(records) and vertical
columns(fields).
field
a single characteristic of data that appears in a table as a column
records
Rows in a database table that consist of a group of related fields.
entity relationship model(ERM)
database modeling method used to construct a theoretical and conceptual
representation of data to produce a database schema. helps a business understand
relationships between different tables of data and form queries to analyze data.
database schema
a map of data tables and their relationships to one another
Database Management System (DBMS)
online version of a filing cabinet(theoretically the first one). must create files in tables
and relate tables to each other to follow the "Data validation" rules. organizes info based
on a set of rules.
data integrity
when an organization has inconsistent duplicated data
, redundancy
multiple duplicate devices and paths in a DBMS.
accessibility
DBMS can implement security features that give only a certain group of people access
to sensitive info(ex: HR can only see employee ID's in a database and not their SSN)
Structured Query Language (SQL)
most widely used standard computer language for relational databases as it allows a
programmer to manipulate and query data.
EX:
SELECT Title
FROM Book
WHERE Price > 100
ORDER BY Price
showing the titles in the Books table where their price is greater than 100 in the order of
price.
APPEND query
adding new books
DELETE query
to delete records from one or more tables, including using a criteria to specify which
rows should be deleted
UPDATE query
help increase price simultaneously or change something in a table simultaneously.
perfectly accurate and faster
the cloud
Using computer resources like a hard drive and software that exist on another computer
connected by a network, typically the Internet.
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