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Introduces database concepts, including relational databases, tables and data types, data selection and manipulation, views, stored procedures, and more.
Data model is a collection of concepts that is used to describe the structure of a database.
Used to give or control privilege in a database.
minimum of all or selected values
Column header / field
All possible column values
DDL - Schema: databases, tables, views and many more
A process of producing a set of tables (relations) with a proper attribute.
In SQL the command language used is like an Spanish language.
It is needed when minimum cardinality is optional on a table.
Multi-value dependency
DML - Manipulate data using commands: insert, update and delete
Used to control data access
NO Partial Dependency
NO Transitive Dependency
Used to performed or rollback the changes that we made in the database using DML commands.
Use to retrieve data from multiple tables.
Facts that can be recorded and that have implicit meaning.
Date
There’s no difference between the description of database and the database itself.
Its is one or more columns of a relation or table that is used to identify a record.
Level of database design use to create database.
AND operator displays a record if all the conditions separated by AND are TRUE.
SQL is not a Programming Language.
It is a question or an inquiry, sometimes loosely used for all types of interactions with databases.
It describes how entities are related to each other.
AND operator displays a record if all the conditions separated by AND are FALSE.
Tables
The table is in a 1NF if It satisfies the definition of a relation.
Indirect relationship causes functional dependency.
SQL is used to retrieve data from relational databases.
Internal Level describes the physical storage structure of the database.
To sort the records in descending order, use the DESC keyword.
The participation of an entity in the relationship is optional.
Use to get aggregation results for different groups of records.
Numeric
Database System automatically takes care of backup and recovery.
Relational Model is a table with columns and rows.
Null means zero
Minimum Cardinality describes the minimum number of entity instances that must participate in a relationship.
Structured Query Language is a command use by relational database management system to perform database operations.
An Expression can't be a number, columns, literals, functions connected by operators
Records that have matching records from two (2) tables
Asterisk (*) means all or a list of _____
sum of all or selected values
DDL used to control data access.
They are liable for identifying the data to be stored within the database and for selecting appropriate structures to represent and store this data.
Like Web search engines (engine like Google), which the user can specify a string or any keywords and expect to get a relevant result.
The relational model (RM) was first described by Edgar F. Codd
Controlling Redundancy is used to improve the performance of queries.
An attribute that has a multiple value.
We call the database and DBMS software together as a _____
It is a combination of symbols and operators that returns a single value.
Table
Data abstraction is the data type, relationships and constraints that apply to the data.
Describes how entities are related.
NO “repeating groups” (columns)
Used to manage data within the object schema.
Include all qualified records from the right table in the join condition even if they do not have matching records in the left table.
A non-key attribute is dependent on part of a composite primary key.
A single entity instance of one entity class is related to a multiple entity instance of another entity class.
It is a stricter form of 2nd and 3rd normal form
Each entity instance of one entity class is related to a multiple entity instance of another entity class; and vice versa.
Table definition
Columns or expressions can be in the SELECT clause only if they are in the GROUP BY clause.
Attribute is a name for a set of similar things that you can list. Like objects, events, people.
The interface presents a menu that lead to a user through request.
It is the number of attributes in a relation.
Attribute describes an entity class.
Used to define and modify data structures
No primary key can be null.
Cross Join – Used the foreign key as the matching criteria
Composite attribute can be divided into more attributes.
This relationship exists if they are independent or different to each other.
Relationships can't have attributes.
average of all or selected values
The interface allows users to access their data through their mobile phone or mobile device.
A displayed schema is called Schema figure.
Include all qualified records from the left table in the join condition even if they do not have matching records in the right table.
A computerized system that permits users to create and maintain a database.
Data Manipulation Language is use for manipulating data in a database.
An Expression can be a single constant, column, variable, or scalar function.
Who is responsible in administering the primary and secondary resource in the database?
Is an instance of a particular entity.
The participation of an entity in the relationship is mandatory.
Row
It is between high-level and low-level data models.
Constraints
Logical Design – transforming the ERD into relational model.
Entities can be related indirectly by two (2) relationships.
Composite Attribute can be calculated from other attributes.
maximum of all or selected values
Entity Instance is an instance of a particular entity.
Entity Relationship Diagram (ERD) was proposed by _____
_____ means missing value.
Display a form to be fill out by the user.
Columns
Include all qualified records from both tables in the join condition.
It is the number of tuples in a relation.
The table is in a 2NF if there's NO Partial Dependency.
It is a collection of related data.
DCL - Use the command: Permissions
Compound Conditions use logical operators to filter or connect multiple criteria.
Null means a value is unknown.
Used for creating tables, schema etc. in database.
OR operator displays a record if any of the conditions separated by OR is TRUE.
People whose jobs require access to the database for querying, updating, and generating reports.
Maximum Cardinality describes the maximum number of entity instances in the relationship.
Boolean
Used to retrive data and manipulate data
Use _____ if there is ambiguity when distinguishing a column.
It is a command used or a request for information from a database.
Character
A single entity instance of one entity class is related to a single entity instance of another entity class.
Used to sort the result.
We use _____ to give column another name.
A thing that shares a common attribute.
Displays a record if any of the conditions separated by OR is TRUE.
number of all or selected values
Physical data models is a concept that shows how the data is stored on the computer.
For each entity instance the value of the identifier attribute is Unique.
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