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