DBMS and Relational Databases
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Questions and Answers

What is the purpose of the USE command in MySQL?

  • To select a database to work with (correct)
  • To delete a database
  • To insert data into a table
  • To create a new database

    • What is the data type of the gender field in the person table?

  • VARCHAR(1) (correct)
  • INT
  • BOOLEAN
  • VARCHAR(5)

    • What is the correct syntax to insert data into the person table?

  • INSERT INTO person (first_name, last_name, gender) VALUES ('Jane', 'Do', 'F'); (correct)
  • INSERT person VALUES ('Jane', 'Do', 'F');
  • INSERT INTO person VALUES ('Jane', 'Do', 'F');
  • INSERT INTO person (first_name, last_name) VALUES ('Jane', 'Do');

    • What is the purpose of the UPDATE command in MySQL?

    <p>To modify data in a table</p> Signup and view all the answers

    What is the default port number used to connect to the MySQL server?

    <p>3306</p> Signup and view all the answers

    What is the purpose of the CREATE TABLE command in MySQL?

    <p>To create a new table</p> Signup and view all the answers

    What is the correct syntax to create a new database in MySQL?

    <p>CREATE DATABASE instructor_DB;</p> Signup and view all the answers

    What is the purpose of the SELECT command in MySQL?

    <p>To retrieve data from a table</p> Signup and view all the answers

    What is the primary function of a Database Management System (DBMS)?

    <p>To store, organize, manage, and process data</p> Signup and view all the answers

    What is the term for the real-life things about which we want to store data?

    <p>Entities</p> Signup and view all the answers

    What is the purpose of a data model?

    <p>To organize and structure data</p> Signup and view all the answers

    What is the language used to interact with relational databases?

    <p>SQL</p> Signup and view all the answers

    What is the function of the CREATE TABLE command in SQL?

    <p>To create a new table</p> Signup and view all the answers

    What is the term for the physical representation of an entity, with each attribute becoming a field within the table?

    <p>Table</p> Signup and view all the answers

    What is MySQL?

    <p>A software that runs as a server</p> Signup and view all the answers

    Study Notes

    Database Management Systems (DBMS)

    • A DBMS is a computer system that helps store, organize, manage, and process data.
    • It is a high-level system that enables users to define, record, query, update, and manage data.
    • DBMS provides functionality to create, host, and manage databases.

    Relational Databases

    • Relational databases are a type of DBMS that stores data in tables with relationships between them.
    • This course focuses on relational databases, specifically MySQL.

    Entities and Attributes

    • Entities are real-life things about which we want to store data.
    • Examples of entities include a person, a book, a car, or a building.
    • Attributes are the data itself, which can be physical characteristics (e.g., weight, height, color) or other types of information.

    Data Models

    • A data model is a larger design that includes multiple entities and their attributes.
    • It is a conceptual design that helps us organize and structure data.
    • Data models are similar to building designs or plans.

    Databases and Tables

    • A database is a collection of entities, which are stored in tables.
    • A table is a physical representation of an entity, with each attribute becoming a field within the table.
    • A database can contain multiple tables, and each table can have multiple fields.

    MySQL

    • MySQL is a specific relational database management system (RDBMS) used for this course.
    • It is a software that runs as a server, and can be accessed using a client application like MySQL Workbench.
    • MySQL uses a language called SQL (Structured Query Language) to interact with the database.

    SQL Basics

    • SQL is a language used to interact with relational databases.
    • There are six basic constructs in SQL:
      • CREATE TABLE: creates a new table.
      • ALTER TABLE: modifies an existing table.
      • DROP TABLE: deletes a table.
      • INSERT: adds new records to a table.
      • UPDATE: modifies existing records in a table.
      • DELETE: deletes records from a table.

    Exercise

    • The exercise is to create a table about an entity called "person" with three fields: first name, last name, and gender.
    • Use the CREATE TABLE command to define the table.
    • Use the INSERT statement to add three records to the table.
    • Use the SELECT statement to list the records.
    • Use the UPDATE statement to modify the records.
    • Use the DELETE statement to delete the records from the table.### Connecting to MySQL Server
    • To connect to the MySQL server, use the username as your last name and student ID as the password.
    • In the port session, leave the port number as 3306.

    Configuring MySQL Workbench

    • Once connected, the MySQL Workbench editor will open with multiple windows.
    • The main window is where you will type SQL commands and send them to the server.
    • The left-hand side window displays databases, which can be expanded to show tables, views, stored procedures, and functions.

    Creating a New Database

    • To create a new database, use the SQL command CREATE DATABASE .
    • The command should end with a semicolon (;).
    • Example: CREATE DATABASE instructor_DB;

    Creating a New Table

    • To create a new table, use the SQL command CREATE TABLE .
    • Define the fields (attributes) of the table, including data types and lengths.
    • Example: CREATE TABLE person ( first_name VARCHAR(15), last_name VARCHAR(15), gender VARCHAR(1) );

    Using the Database

    • To use the newly created database, use the SQL command USE .
    • Once inside the database, you can create tables, insert data, and perform other operations.

    Inserting Data into a Table

    • To insert data into a table, use the SQL command INSERT INTO .
    • Specify the columns and values to be inserted.
    • Example: INSERT INTO person (first_name, last_name, gender) VALUES ('Jane', 'Do', 'F');

    Retrieving Data from a Table

    • To retrieve data from a table, use the SQL command SELECT FROM .
    • Example: SELECT first_name, last_name, gender FROM person;

    Updating Data in a Table

    • To update data in a table, use the SQL command UPDATE SET = .
    • Example: UPDATE person SET last_name = 'Do' WHERE first_name = 'Jane';

    Exercise Summary

    • Create a database table called "person" with three columns: first_name, last_name, and gender.
    • Insert three records into the table using the INSERT command.
    • Retrieve the data from the table using the SELECT command.
    • Update one of the records using the UPDATE command.

    Database Management Systems (DBMS)

    • A DBMS is a computer system that stores, organizes, manages, and processes data.
    • It enables users to define, record, query, update, and manage data.
    • DBMS provides functionality to create, host, and manage databases.

    Relational Databases

    • Relational databases store data in tables with relationships between them.
    • This course focuses on relational databases, specifically MySQL.

    Entities and Attributes

    • Entities are real-life things about which we want to store data.
    • Examples of entities include a person, a book, a car, or a building.
    • Attributes are the data itself, which can be physical characteristics (e.g., weight, height, color) or other types of information.

    Data Models

    • A data model is a larger design that includes multiple entities and their attributes.
    • It is a conceptual design that helps us organize and structure data.
    • Data models are similar to building designs or plans.

    Databases and Tables

    • A database is a collection of entities, which are stored in tables.
    • A table is a physical representation of an entity, with each attribute becoming a field within the table.
    • A database can contain multiple tables, and each table can have multiple fields.

    MySQL

    • MySQL is a specific relational database management system (RDBMS) used for this course.
    • It is a software that runs as a server, and can be accessed using a client application like MySQL Workbench.
    • MySQL uses a language called SQL (Structured Query Language) to interact with the database.

    SQL Basics

    • SQL is a language used to interact with relational databases.
    • There are six basic constructs in SQL:
      • CREATE TABLE: creates a new table.
      • ALTER TABLE: modifies an existing table.
      • DROP TABLE: deletes a table.
      • INSERT: adds new records to a table.
      • UPDATE: modifies existing records in a table.
      • DELETE: deletes records from a table.

    Exercise

    • Create a table about an entity called "person" with three fields: first name, last name, and gender.
    • Use the CREATE TABLE command to define the table.
    • Use the INSERT statement to add three records to the table.
    • Use the SELECT statement to list the records.
    • Use the UPDATE statement to modify the records.
    • Use the DELETE statement to delete the records from the table.

    Connecting to MySQL Server

    • Use the username as your last name and student ID as the password.
    • In the port session, leave the port number as 3306.

    Configuring MySQL Workbench

    • The main window is where you will type SQL commands and send them to the server.
    • The left-hand side window displays databases, which can be expanded to show tables, views, stored procedures, and functions.

    Creating a New Database

    • To create a new database, use the SQL command CREATE DATABASE.
    • The command should end with a semicolon (;).

    Creating a New Table

    • To create a new table, use the SQL command CREATE TABLE.
    • Define the fields (attributes) of the table, including data types and lengths.

    Using the Database

    • To use the newly created database, use the SQL command USE.
    • Once inside the database, you can create tables, insert data, and perform other operations.

    Inserting Data into a Table

    • To insert data into a table, use the SQL command INSERT INTO.
    • Specify the columns and values to be inserted.

    Retrieving Data from a Table

    • To retrieve data from a table, use the SQL command SELECT.
    • Example: SELECT first_name, last_name, gender FROM person;

    Updating Data in a Table

    • To update data in a table, use the SQL command UPDATE.
    • Example: UPDATE person SET last_name = 'Do' WHERE first_name = 'Jane';

    Exercise Summary

    • Create a database table called "person" with three columns: first_name, last_name, and gender.
    • Insert three records into the table using the INSERT command.
    • Retrieve the data from the table using the SELECT command.
    • Update one of the records using the UPDATE command.

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    Description

    Learn about Database Management Systems (DBMS) and Relational Databases, including MySQL. Understand how DBMS helps store, organize, manage, and process data.

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