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