Beginner's Guide to PostgreSQL
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Beginner's Guide to PostgreSQL

PostgreSQL Tutorial: What you need to know to get started with relational databases in PostgreSQL
4.4 (141 ratings)
Instead of using a simple lifetime average, Udemy calculates a course's star rating by considering a number of different factors such as the number of ratings, the age of ratings, and the likelihood of fraudulent ratings.
1,264 students enrolled
Created by Miguel Alho
Last updated 12/2015
English
Current price: $10 Original price: $50 Discount: 80% off
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Includes:
  • 6 hours on-demand video
  • 3 Articles
  • 3 Supplemental Resources
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
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What Will I Learn?
Understand why databases are useful
Understand how relational databases work
Learn how to install and setup PostgreSQL
Learn how to create databases and database structures
Learn how to insert and manipulate data in a PostgreSQL database
Learn how to write SQL statements for PostgreSQL
View Curriculum
Requirements
  • Basic computer knowledge (no programming or database knowledge required)
Description

PostgreSQL is an awesome open source relational database, that's fast and easy to use. We've used it here at my company in a few large projects with great performance.

In this beginner level PostgreSQL tutorial course I'll be going over all the basic concepts of relational databases and dive into how to use PostgreSQL. No previous database experience is required for this PostgreSQL tutorial course - all the basic concepts like tables and relations are covered. It's thorough and meant to help anyone starting out with databases.

The PostgreSQL tutorial course covers database concepts, database installation and connection, client software used to connect to and manage the database (pgAdminIII) and also the main SQL statements and how they work with PostgreSQL.

This PostgreSQL tutorial course is currently under construction, with close to 5 hours of material already available. Considering that, I'll be offering it at a discounted price. Once finished, it will be priced at $99.

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Who is the target audience?
  • Database beginners
  • Basic database users who want to understand and learn PostgreSQL
Students Who Viewed This Course Also Viewed
Curriculum For This Course
Expand All 70 Lectures Collapse All 70 Lectures 05:58:04
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Introduction
9 Lectures 39:44

In this video i talk about this course and how it is structures. The course is divided in to 3 modules -

  • An introduction to databases and PostgreSQL
  • How to create and manipulate databases
  • SQL Primer in PostgreSQL
Preview 02:19

In this video, we'll talk about why we need databases and take a look at basic basic concepts:

  • Tables
  • Columns
  • Rows
  • Fields
Preview 05:15

In this video we'll look at Identity columns in our database tables, and how we'll use them to uniquely identify each record in a table.

Preview 02:45

Normalization is a process in database construction. We use it to extract repeated information in our databases' tables, which avoids maitenance errors. A well normalized database is usually better organized and more maintainable. This will also set the bases for relationships in our database.

Preview 04:10

In this video, we look at what relationships between tables are and why they are important in a database.

Relationships
07:00

Just a quick check up quiz

Relationship Quiz
3 questions

In this video we'll have a look at the 3 main types of relationships we can create between tables in a relational database:

  • one to one
  • one to many
  • many to many
Relationship Types
05:47

Quick quiz to see if you've this one down!

Relationship Types Quiz
4 questions

In this video, I present a quick overview of database management systems and a high level view of how they work.

Database Management Systems
03:14

In this video i give a quick review of PostgreSQL features and some of the limits associated with it.

PostgreSQL features
03:34

Learn step-by-step how to install PostgreSQL on a Windows machine

Preview 05:40
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Database Usage Basics
26 Lectures 02:35:18

In sthis video, we'll start pgAdmin III - the client application we'll use to connect to, manage and manipulate our databases, and connect to our local database server, that we installed in the previous step.

When you open pgAdminIII for the first time, it should have you're local server in the servers list. In this video, I'll show you how to register a server in the list, in case your local server is not available or if you wish to connect to a remote server.

Connecting to Database Server with pgAdmin III
03:30

By default, the server installation won't allow you to connect to the databases from external computers - only the local machine is allowed.

To allow other computers to connect, you need to edit the pg_hba.conf, and open a firewall port. This video shows you how.

Note:

Around minute 4, I mention the CIDR notation. For more details and a cheat sheet for CIDR netmask notation, check out: http://www.oav.net/mirrors/cidr.html

Configuring PostgreSQL to Accept External Connections
07:29

In this vídeo, I'll show you how to create a database through pgAdmin III. The process only requires you give your new database a name, but there are other options that are available and usefull, and I analyse them in this video.

Creating Databases
06:21

In this video we'll look at how tables are created in pgAdmin III and the options available for the table.

Creating Tables
06:59

In this video, I show you how to add, edit and delete records in a table, and also how to use the table's ordering and filtering options, within pgAdmin III.

Inserting and viewing data in pgAdmin III
09:46

PostgreSQL suports multiple data types for its columns and choosing the right datatype for each column is importante, both for correct data representation and database optimization. This lesson is just a short video to set the stage for the next few clips.

DataTypes Intro
01:19

Postgres offers a series of datatypes to eficiently store numbers in diferent  formats and ranges. In this video I review the numeric types and show some examples of how rounding decimal numbers works, and some errors that may occur.

Numeric DataTypes in PostgreSQL
10:58

Here We talk about how the serial and bigserial types work in creating record IDs in our tables.

Serial Datatypes For Row Ids
04:34

In Postgres, 3 datatypes are available to store character-based information: char(n), varchar(n) and text. In this video I go over their diferences.

Character Types
06:11

There are a few datatypes we can use for date and time information. In this video we look at the date type

The Date Datatype
05:05

We can use the time type to store time information, without dates. This video shows how to write the times into a tables field and some variations of the notation

The time datatype
03:53

Uou can combine date and time in the same field using the timestamp datatype. It also allows the storage of timezone data, essential to any aplication that crosses timezones.

Timestamps
07:28

The boolean datatype allows us to store eaither a true or false value. It is very comun to use it to store data that answers true/false or yes/no questions.

The boolean datatype
02:36

The NULL value allows us to meaningfully indicate that a certain field's data is unkown, and a better option to inserting fake or misleading default values.

NULL Values
05:05

The requirments gathering process is important in database construction since it allows for a better understanding of the problem that our databse will solve. In this video, we present requirements for our car repair shop database, to be used in the next few videos.

Requirements
02:23

This PDF contains the set of slides used to define the requirements for our database. 

Car Repair Shop DB Requirements
4 pages

In this video, we go through the client part of requirements and design our database tables. We transform requirements into tables, columns and relationships.

Designing the repair shop database Pt1
08:06

In this second part, we design the tables to store data for our repair shop's interventions on vehicles. 

Designing the repair shop database Pt2
04:27

In this video we choose the datatypes for our columns, based on what they will contain.

Designing the repair shop database Pt3 - choosing datatypes
02:42

This PDF contains the table definitions from the last set of videos. Use it to follow along the database creation in pgAdmin III

Car Repair Shop DB Table and Column Definitions
3 pages

When creating tables, we need to start off with those that don't have any dependencies - that is, that have no foreign keys to other tables. Creating these first avoids any problems defining the foreign key constraints on the tables.

Building the Database - Part 1
07:25

Constraints are rules we apply to our tables' columns in order to garantee that certain rules are followed when we enter data. Will take a look at the constraints Postgres allows in this video.

Applying constraints to table columns
08:03

The next set of tables we create will have foreign keys so we need to create the table and while doing so, establish the relationship with the table that we will be referencing.

Creating relationships between tables in pgAdmin III
05:08

In this video, we finish creating the car repair shop database by building the remaining three tables.

Creating the remaining tables
12:34

We can create new users (called roles, within PG) to control how users access the database. There are a few steps you need to take in Postgres to correctly create new users. Ins this lesson, I cover those steps so that a new user can connect to a specific database and access it with the necessary privileges.

Users and Privileges
14:10

Database backups are very important in avoiding data loss due to system failures, harddrive failures and even human error. Postgres comes with a couple of aplications that allow us to backup a database (pg_dump) and restore a backup (pg_restore). We can access and manage the options through pgAdmin III. In this video I show you how to backup and restore a database.

Backup and Restore in PostgreSQL with pgAdmin III
09:06
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SQL in PostgreSQL
34 Lectures 02:35:57

This video is an overview of what will be covered in this third module.

Preview 02:49

In this video we look at the CREATE TABLE command, and use it to build a very simple version of the carBrand table. No constraints are aplied to the table - it is ment to understande the basic sintaxe and structure of the statement.

The CREATE TABLE command
05:48

In this video, we will recreate the carBrand table, but we'll add the PRIMARY KEY constraint to the id column, and NOT NULL and UNIQUE constraints to the name column in the SQL statement.

We'll also create the client table, and add a default value to a column in that table.

The CREATE TABLE command with constraints PT 1
06:29

In this video , we build the remaining two tables with no foreign keys in the RepairShop database.

I'll show you how to execute multiple statements in the same run, add check constraints, and also look at an anlternative notation for the column and constraint organization of the CREATE TABLE command.

The CREATE TABLE command with constraints pt.2
03:56

You can use the SQL statements in this file to quickly execute the steps I take in the previous video.

Script: First Two Create Table commands
00:08

In this table we look at creating tables with foreign key constraints and the notation variations associated to it.

The CREATE TABLE command with foreign keys PT 1
04:01

In this video we create the rest of the tables that have foreign key references. I also introduce comments and selective execution of the script.

The CREATE TABLE command with foreign keys PT 2
05:18

Scripts: Create Tables with Foreign keys
00:08

A couple of quiz style questions about the CREATE TABLE command

CREATE TABLE quiz
2 questions

In thsi video we look at the DROP TABLE and DROP TABLE... CASCADE command and also how to save and recall queries in the query editor.

Drop Table
04:22

The ALTER TABLE command allows us to edit our data structure: we can create or drop new columns, alter datatpyes and constraints or even modify existing constraints.

In this video we create a blank table (partAdded) that is missing in our database, and create the missing columns using the ALTER TABLE command.

ERRATA:

I made a couple of mistakes in this clip. First, the third colum created in the video is "vehicle_id" but should have been "intervention_id" and reference the intervention table. Second, the check constraint on the cost column should have been ">=". The error are highlçighted in the video.

The Alter Table command
12:48

Script: Drop And Alter Table commands
00:09

The INSERT INTO SQL Command allows us to insert rows of data into our database tables. This video shows you how to build basic insert statements that insert one or more rows into the table.

Note: When I refer to quotation marks, I sometimes don't indicate if they are single or double. So, for table names or column names that have capital letters, you need to use double quotes, while for string values, you use single quotes.

Insert Into SQL Command
09:30

You can use the SQL statements in this file to quickly execute the steps I take in the previous video.

Insert scripts used in the previous video
636 Bytes

The Update Statement
15:30

Includes The Insert statement to add clients to the table and the update statements used in the video

Update Script file
7.4 kB

In this lesson, I talk about the DELETE FROM statement and show how to use it to delete specific rows or all the rows from a table.

The DELETE FROM Statement
05:09

Typicly, deleting data from a table only afects the data in that tabel. When dealing with tables that are references for foreign keys, you can't delete data without deleting all the dependant elements.

In this video, we see how to build delete statements to handle multiple tables with dependant data and how to use the ON DELETE CASCADE clause in foreign key constraints.

Deletes with cascades
08:02

The file contains the script used in the delete from command videos.

Script: Delete from commands for the previous videos
974 Bytes

The TRUNCATE command allows us to quickly delete all the rows in a table and CASCADE the deletes to related tables. We can also use a "Restart Identity" clause to reset the sequence that sets the primary key's value.

The TRUNCATE command
05:08

The script used in the previous TRUNCATE command video.

Truncate Script
718 Bytes

Before we procede to hte next set of videos, where we will be executing SELECT commands, It is important that we add data to the database. I've provided a script file that adds data, which you can download from the next lesson. In this video, I show you how to use the file to insert data into the database.

Filling the database with data
04:04

Before we procede to the next set of lessons, it is important to insert data into the database to be able to create meaningfull SELECT statements. Use the provided script file to add data to the database.

Full Db Script
209.9 kB

This video is the first in a series of clips whare we work on selecting data. We start by analysing the basic components of a query.

The SELECT command
03:30

We have a look at the grafical query builder in pgAdmin that lets you create queries in a drag n' drop style of editing.

pgAdmin III's Graphical Query Builder
02:39

The WHERE clause in the select statement allows us to filter the data that the query returns, generating precise result sets. In this video we look at how we can create expressions in the where clause.

The WHERE clause (PT I)
04:57

In this video we look at the BETWEEN and IN operatores and their use in WHERE clauses to filter data through ranges or sets of values.

The WHERE clause (PT 2) - BETWEEN and IN
04:36

We can't use the equal sign or not equal sign in our statements to compare with NULL since NULL represents no data. To use NULLs in a statement correctly We need to use the IS or IS NOT keywords. 

The WHERE clause (PT 3) - IS [NOT] NULL
03:15

Pattern matching is an important form of filtiring, especially when working with strings. Being able to match a part of a string can become a simple yet powerful mechanism for search. In this video we look at the various forms of the LIKE operator in the WHERE clause.

The WHERE clause (PT 4) - LIKE and ILIKE
09:32

We can build queries that have a WHERE clause, using the graphical query builder. In this video I show you how to compose those queires using diferent types of criterias.

The WHERE clause - using the graphical query builder
10:38

This file contains the various SELECT statements used in the previous vídeos.

The WHERE Clause Command Script
3.0 kB

LIMIT and OFFSET allow us to create a paging mecanism in our queries - LIMIT limits the number of rows returned, while OFFSET allows us to skip rows from the beginning of the full set. In this video I'll show you some examples of how this is implemented in a SELECT statement.

The LIMIT and OFFSET clauses
05:23

A simple quiz related to Limits and Offsets

QUIZ - Limits and Offests
2 questions

The ORDER BY clause allows us to order the results by a set of columns. Orderingcan be ascending (ASC) or descending (DESC), and some care must be taken when handling NULL values. In this video, I show some examples of how to use the ORDER BY clause in select statements.

The ORDER BY clause
06:57

This file has the SQL statements used in the Order by video, to help you follow allong and test the commands.

Order By commands
766 Bytes

Aggregate functions are a powerful SQL mechanism that allows you to compute values on result sets from your select queries.

Aggregate functions - Count, Max, Min, Avg
11:10

...
Joins tables in a query through relationships
About the Instructor
Miguel Alho
4.4 Average rating
141 Reviews
1,264 Students
1 Course
Develeper and Owner of Miguel Alho - Multimedia

I am currently running my own web-based software development company (mainly .NET based ) building HRIS (Human Resource Information Systems) software for HR teams. I've also been employed as a teacher to 7th and 8th graders in Tec. Ed. classes, and voluntarily accepting 12th grade internships of IT students through local schools.

I am currently finishing a couple of web based projects for one of Sonae's human resources departments - Sonae being the largest private employer in Portugal, after having concluded a project for a Cape Verdian Bank (in colaboration with G333.Net).

When possible, I work on internal R&D projects, namely our devolpment framework, a DSL for code generation, and product ideas. I also colaborate with various local companies and institutions, both professionaly and voluntarily, namely the Santa Casa da Misericórdia da Murtosa.

My colleagues and I are experienced in developing costumized software, service and database solutions for businesses. We work with .Net, PostrgeSQL databases (or others as needed) , Ajax and Javascript based interfaces and our own internal framework for rapid development and maitenance.