MySQL study for exam 1

MySQL study for exam 1

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Section 1

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foreign key

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Cards (144)

Section 1

(50 cards)

foreign key

Front

one or more columns in a table that refer to a primary key in another table

Back

JDBC (java database connectivity)

Front

most common data access API for MySQL

Back

record

Front

rows

Back

API (application programming interface)

Front

Back

business component

Front

where the processing that is not on the client that is done by the application is stored on one or more of these on the application server

Back

wide area network (WAN)

Front

two or more LANs that reside at separate geographical locations can be connected as a part of a larger network such as this

Back

value

Front

what is stored at the intersection of each row and column

Back

server

Front

also known as database server

Back

entity-relationship (ER) diagram

Front

shows how the tables in a database are defined and related

Back

database server

Front

also called server computer that has enough processor speed, internal memory (RAM), and disk storage to store the files and databases of the system and provide services to the clients of the system can be a high-powered PC

Back

enterprise system

Front

system that consists of networks, midrange systems, and mainframe systems often spread throughout the country or the world

Back

data manipulation language (DML)

Front

statements that work with the data in a database

Back

unique key

Front

non-primary key uniquely identifies each row in a table

Back

non-primary key

Front

if a certain column in the table contains unique data

Back

open-source database

Front

any developer can view and improve its source code

Back

field

Front

columns

Back

web server

Front

used to store web applications and web services

Back

index

Front

an efficient way of accessing the rows in a table based on the values in one or more columns

Back

web application

Front

applications that are designed to run on a web server

Back

data definition language (DDL)

Front

statements that create databases and work with the objects within a database lets you work with the objects in the database

Back

cell

Front

the intersection of each row and column

Back

SQL extension

Front

additions to the standards of SQL

Back

table

Front

where models for relational databases are stored, in one or more of these

Back

database administrator (DBA)

Front

uses, on large systems, data definition languages exclusively

Back

default value

Front

values that are automatically set for those certain cells or rows or columns

Back

front end

Front

processing that's done by the client software what the client is referred to

Back

referential integrity

Front

makes sure that any changes to the data in the database do not create any invalid relationships between tables

Back

auto increment column

Front

a table that contains a numeric column whose value is generated automatically by the DBMS

Back

composite primary key

Front

a primary key that can also consists of 2 or more columns

Back

relational database management system (RDBMS)

Front

Oracle ran on a minicomputer used SQL as its query language

Back

network

Front

cabling, communication lines, network interface cards, hubs, routers, other components that connect the clients and the server

Back

query results

Front

requested data which is returned to the client when the DBMS receives a query

Back

SQL (structured query language)

Front

standard language that lets any application communicate with any DBMS

Back

web service

Front

like business components, except they are designed to run on a web server

Back

application server

Front

where the rest of the processing thats done by the application is stored on one or more business components on this

Back

SQL dialect

Front

variants of SQL

Back

enhanced entity-relationship (EER) diagram

Front

newer version of an ER diagram

Back

client

Front

PCs, Macs, or workstations of the system can also be mobile devices like laptops, tablets, and smartphones

Back

database management system (DBMS)

Front

manages the databases that are stored on the server includes MYSQL or Microsoft SQL Server

Back

data access API

Front

so application software is run on the client that uses data that's stored on the server provides interface between the application program and the DBMS

Back

one-to-many relationship

Front

where each row in one table is related to one or more rows in the other table

Back

back end

Front

processing done by the database management system

Back

thin client

Front

low cost centrally managed computer free of any drives like CD, diskettes, etc.

Back

web browser

Front

runs when a client sends a request to a web sever over the internet

Back

many-to-many relationship

Front

implemented by using an intermediate table that has a one-to-many relationship with the two tables in the many-to-many relationship

Back

application software

Front

each client requires this to perform useful work can be a purchased software package or can be a custom software that's developed for a specific application

Back

null value

Front

nothing, void, no value

Back

relational database

Front

eliminated some of the problems that were associated with standard files and other database designs reduces data redundancy, saves disk storage and leads to efficient data retrieval

Back

primary key

Front

if table contains one or more columns that uniquely identify each row in the table, each of the columns are these

Back

local area network (LAN)

Front

in a simple client/server system typically a high-powered PC that communicates with the clients over this

Back

Section 2

(50 cards)

SQL script

Front

file that contained one or more SQL statements

Back

comparison operator

Front

used to compare any two expressions

Back

MySQL command line client

Front

allows you to enter in SQL statements that work with MySQL databases

Back

inner join

Front

most common type of join rows from the two tables in the join are included in the result table only if their related columns match

Back

qualified column name

Front

type the table name, followed by a period, followed by the column name

Back

wildcard

Front

special symbols that the mask for a LIKE phrase can contain

Back

null value

Front

represents a value thats unknown, unavailable, or not applicable not the same as a zero or empty string

Back

schema

Front

provides access to the database objects that are available

Back

literal value

Front

does not need to be enclosed in quotes

Back

parameter

Front

argument that may be required by the function entered within the parenthesis also called argument

Back

query

Front

what a SELECT statement is commonly referred to as

Back

database driver

Front

used by API to communicate with the database some languages have this built in already

Back

MySQL workbench

Front

Back

database object

Front

includes tables, views, stored procedures, and functions

Back

SQL-92 syntax

Front

Back

inner join

Front

most common type of join only those rows that satisfy the join condition are included in the result set

Back

order of precedence

Front

PEMDAS left to right based on multiplication then division then modulus operators

Back

keyword

Front

capitalized words have to be typed exactly as shown

Back

mask

Front

aka string pattern are NOT case sensitive determines which values in the column satisfy the condition

Back

calculated value

Front

calculated from columns in the table can be included in the result set

Back

database service

Front

piece of software that MySQL runs off of after installation of MySQL

Back

join

Front

data from the two tables are joined together into a single result set

Back

column alias

Front

specifying a different name for a column, substitute name, by using the AS phrase

Back

boolean expression

Front

results in a true, false, or NULL value

Back

ADO.NET

Front

an API

Back

ad hoc relationship

Front

ability to join tables based on relationships not defined in the database

Back

base table

Front

the original table of which the columns are first retrieved from

Back

expression

Front

combination of column names and operators that evaluate to a single value

Back

concatenate

Front

uses the CONCAT function to join tow or more string columns or literal values

Back

mysqli

Front

MySQL improved edition does not require a database driver

Back

function

Front

performs an operation and returns a value

Back

subquery

Front

query within a query

Back

regular expression

Front

what the REGEXP operator allows you to create complex string patterns

Back

string pattern

Front

also called mask can use the LIKE or REGEXP operators to retrieve the rows that match this specific thing

Back

database server

Front

starts automatically when computer is started

Back

MySQL reference manual

Front

useful tool for working in the MySQL database

Back

PDO

Front

PHP data objects does not require a database driver

Back

outer join

Front

lets you include all rows fro a table even if the other table doesn't even have a matching row

Back

snippet

Front

contain the syntax for many common SQL statements

Back

result set

Front

a logical table that's created temporarily within the database what is retrieved when the application requests data from database

Back

logical operator

Front

includes AND OR

Back

offset

Front

starting point for the result set specifies the first row to return

Back

string

Front

can contain any combination of characters

Back

search condition

Front

what the WHERE clause specifies

Back

compound condition

Front

created by logical operators that consist of two or more conditions

Back

database engine

Front

same thing as database service

Back

nested sort

Front

Back

join

Front

lets you combine columns from two or more tables into a single result set

Back

join condition

Front

indicates how the two tables should be compared

Back

explicit syntax

Front

Back

Section 3

(44 cards)

union

Front

combines data from two or more tables combines rows from two or more sets instead of combining columns from base tables

Back

normal forms

Front

Back

declarative referential integrity (DRI)

Front

used by defining foreign key constraints

Back

implicit syntax

Front

the syntax for coding joins used prior to SQL-92 standards

Back

cross join

Front

produces a result set that includes each row from the first table joined with each row from the second table

Back

summary query

Front

query that contains one or more aggregate function

Back

scalar function

Front

operates on a single value and returns a single value

Back

composite index

Front

include two or more columns used when the columns in the index are updated infrequently or when the index covers almost every search condition in the table

Back

subquery

Front

a SELECT statement that's coded within another SQL statement

Back

full outer join

Front

result set includes all the rows from both tables returns unmatched rows from both the left and right tables

Back

data redundancy

Front

reduced by normalization can cause storage and maintenance problems

Back

aggregate function

Front

operate on a series of values and return a single summary value

Back

equijoin

Front

when you use the equal operator to join two tables on a common column common for the columns that are being compared to have the same name

Back

self-join

Front

a joint that joins a table with itself rare sometimes useful for retrieving data that can't be retrieved any other way

Back

multivalued dependency

Front

primary key column has a one-to-many relationship with a non-key column

Back

schema

Front

databases that are stored in a MySQL server

Back

derived data

Front

Back

referential integrity

Front

relationships between tables are maintained correctly table with a foreign key does not have rows with foreign key values that don't have matching primary key values in the related table

Back

denormalization

Front

can result in larger tables, redundant data, reduced performance you should do this based on the way the data will be used

Back

index

Front

structure that provides for locating one or more rows directly when this is used, the database management system can go directly to a specific row rather than having to search though all the rows until it finds it

Back

CASE

Front

used for complicated designs computer aided software engineering tool

Back

entity-relationship (ER) modeling

Front

to model a database system after a real-world system to model a database and the relationships between its tables after a real-world system

Back

normalized data structure

Front

each table contains information about a single entity each piece of information that is stored in exactly one place

Back

right outer join

Front

result set includes all the rows from the second, or right, table

Back

outer join

Front

retrieves all rows that satisfy the join condition, plus unmatched rows in the left or right table

Back

instance

Front

stored in each row, one occurrence of the entity

Back

orphaned row

Front

when referential integrity is not enforced and a row is deleted from the primary key table that has related rows in the foreign key table rows in the foreign key table are said to be this

Back

left outer join

Front

result set includes all the rows from the first, or left, table

Back

attribute

Front

information for the entity stored in each column

Back

column function

Front

aggregate functions called this because they typically operate on the values in columns

Back

normalization

Front

formal process that can be used to separate the data in a data structure into related tables

Back

linking table

Front

to link two tables that have a many-to-many relationship after this, then each of the tales in the many-to-many relationship will have a one-to-many relationship with this does not usually have a primary key also called connecting table or associate table

Back

table scan

Front

involves searching through the entire table

Back

Boyce-Cods normal form

Front

used to eliminate transitive dependencies

Back

entity

Front

one object in the real-world system

Back

domain-key normal form

Front

no database system has implemented a way to apply this

Back

table alias

Front

an alternative table name that is typically just a letter or two assigned in the FROM clause makes SQL code easier to read

Back

data structure

Front

refers to the model of the database rather than the database itself

Back

unnormalized data structure

Front

each table contains information about a single entity each piece of information is stored in exactly one place

Back

enhanced entity-relationship (EER) model

Front

extends the ER model

Back

natural join

Front

uses the NATURAL keyword joins two tables based on all columns in the two tables that have the same name

Back

Cartesian product

Front

the result set is known as this of the tables

Back

foreign key constraint

Front

indicate how the referential integrity between the tables is enforced

Back

transitive dependency

Front

one column depends on another column, which depends on a third column

Back