Beginner's Guide to PostgreSQL

PostgreSQL Tutorial: What you need to know to get started with relational databases in PostgreSQL
  • Lectures 70
  • Video 6 Hours
  • Skill level all level
  • Languages English
  • Includes Lifetime access
    30 day money back guarantee!
    Available on iOS and Android
    Certificate of Completion

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Course 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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What are the requirements?

  • Basic computer knowledge (no programming or database knowledge required)

What am I going to get from this course?

  • Over 70 lectures and 6 hours of content!
  • 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

What is the target audience?

  • Database beginners
  • Basic database users who want to understand and learn PostgreSQL

What you get with this course?

Not for you? No problem.
30 day money back guarantee

Forever yours.
Lifetime access

Learn on the go.
Desktop, iOS and Android

Get rewarded.
Certificate of completion

Curriculum

Section 1: Introduction
02:19

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
05:15

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

  • Tables
  • Columns
  • Rows
  • Fields
02:45

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.

04:10

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.

07:00

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

Relationship Quiz
3 questions
05:47

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 Quiz
4 questions
03:14

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

03:34

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

05:40

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

Section 2: Database Usage Basics
03:30

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.

07:29

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

06:21

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.

06:59

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

09:46

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.

01:19

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.

10:58

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.

04:34

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

06:11

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.

05:05

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

03:53

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

07:28

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.

02:36

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.

05:05

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.

02:23

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.

4 slides

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

08:06

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

04:27

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

02:42

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

3 slides

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

07:25

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.

08:03

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.

05:08

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.

12:34

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

14:10

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.

09:06

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.

Section 3: SQL in PostgreSQL
02:49

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

05:48

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.

06:29

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.

03:56

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.

Text

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

04:01

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

05:18

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.

Scripts: Create Tables with Foreign keys
Text
CREATE TABLE quiz
2 questions
04:22

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.

12:48

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.

Script: Drop And Alter Table commands
Text
09:30

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.

636 B

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

The Update Statement
15:30
7.27 KB

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

05:09

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.

08:02

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.

974 B

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

05:08

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.

718 B

The script used in the previous TRUNCATE command video.

04:04

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.

204.97 KB

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.

03:30

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.

02:39

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

04:57

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.

04:36

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.

03:15

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. 

09:32

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.

10:38

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.

2.91 KB

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

05:23

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.

QUIZ - Limits and Offests
2 questions
06:57

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.

766 B

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

11:10

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

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Instructor Biography

Miguel Alho , 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.

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    • Dan Harding

    Good Beginner Instruction

    As a complete beginner to PostgreSQL, I found this course to be exactly what I needed - a patient walk through and introduction to key concepts. The videos were well done - every step of the way had a patient and slow verbal explanation - there was no assumption on the part of instructor that left me wondering how he was logically progressing. The verbal explanations were succinct, well-thought out, and helpful. My computer science background is limited - I have had a community college course on full stack web development, and I have taken a number of online courses from Codecademy. This is my first Udemy course. So, my expectations were simply that I would come away from the course feeling like I had a grasp on the basics of PostgreSQL. I am very confident in Excel, and knew that SQL variants are also table-based, so knew that if I could apply my general knowledge and implement the appropriate syntax, I would be well-equipped to begin attacking my own database solutions. I consider the course a success in this regard. Regarding Codeacdemy, if you are looking for a course that asks you to solve problems in order to advance, this is not that type of course - it is a course for having PostgreSQL explained to you while you work alongside in the editor. I had my screen split in two, with the Udemy video in one screen, and the database admin program in the other. I typed along with everything in the video, as is my learning style, but you don't have to do that if you don't want to. I now feel confident to Google questions and read the PostgreSQL documentation and go from there. I also appreciated the full walk through of how to install the database admin program. A note on pricing: I purchased this course on a $10 sale. The full price is $49. It was very much worth the $10 - a no-brainer. If you're not in position to wait until it may or may not go on sale again, I would say that $49 is also very much worth the content, expertise, and good instruction in this course.

    • Michael Jones

    The course does what the title states. It covers the basics in Postgresql and relates these to both gui driven queries and writing the same in SQL. The lectures include the lecturer typing in teh commands concerned. In this way you get a feel for both Postgresql' pgamin3 and the syntax required.

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