Menu
×
Get Certified For Teachers Spaces Plus Get Certified For Teachers Spaces Plus
     ❯   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS DSA TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI R GO KOTLIN SASS VUE GEN AI SCIPY CYBERSECURITY DATA SCIENCE INTRO TO PROGRAMMING BASH

AWS Training

AWS HOME Configure and Deploy AWS Client VPN Computer Vision with GluonCV Machine Learning for Business Challenges Introduction to Amazon Simple Notification Service (SNS) Introduction to Amazon Simple Queue Service (SQS) Introduction to Amazon Simple Workflow AWS Messaging Services Overview Introduction to AWS Marketplace Introduction to Amazon WorkDocs Introduction to AWS Inferentia and Amazon EC2 Inf1 Instances Introduction to Amazon Elastic Load Balancer - Application Introduction to EC2 Auto Scaling Introduction to AWS Batch Introduction to AWS Elastic Beanstalk Introduction to Amazon EC2 Systems Manager Introduction to Dedicated Instances Understanding Placement Groups Introduction to AWS Auto Scaling Introduction to Amazon Elastic Compute Cloud (EC2) Introduction to Amazon Elastic Container Registry Introduction to Amazon Elastic Container Service Deep Dive on Container Security Introduction to AWS Fargate Introduction to Amazon Kinesis Streams Introduction to Amazon Kinesis Analytics Introduction to Amazon Athena Introduction to AWS Data Pipeline Introduction to Amazon Elastic MapReduce (EMR) Introduction to Amazon Quicksight Introduction to Amazon Mechanical Turk Best Practices for Data Warehousing with Amazon Redshift Deep Dive into Concepts and Tools for Analyzing Streaming Data on AWS Introduction to Amazon Kinesis Data Analytics for Java Applications Building Highly Connected Applications using Amazon Neptune Deep Dive into DocumentDB Amazon DocumentDB Service Introduction Amazon DynamoDB Service Introduction Amazon ElastiCache Service Introduction Mapping a Few Core Oracle DB Concepts to Amazon RDS/Aurora PostgreSQL Concepts Amazon Neptune Service Introduction Amazon RDS Service Introduction Amazon Aurora Service Introduction Introduction to AWS CodeBuild Introduction to AWS CodeCommit Introduction to AWS Command Line Interface (CLI) Introduction to AWS CodePipeline Introduction to AWS CodeStar Introduction to AWS X-Ray IoT Microcontrollers: Onboarding a Raspberry Pi using Raspbian Introduction to IoT Device Defender Introduction to AWS IoT IoT Edge Computing: Introduction to Amazon FreeRTOS Introduction to AWS IoT Analytics AWS IoT: Visual Walkthrough Introduction to AWS IoT Device Management Machine Learning in the Cloud with AWS Batch Introduction to Artificial Intelligence Introduction to Deep Learning Twitch Series: AWS Power Hour Introduction to Machine Learning for Developers Twitch Series: AWS Power Hour Amazon Textract Twitch Series: AWS Power Hour Amazon Comprehend Twitch Series: AWS Power Hour Amazon CodeGuru Twitch Series: AWS Power Hour Amazon Kendra Twitch Series: AWS Power Hour Amazon Connect & Amazon Lex Twitch Series: AWS Power Hour Amazon Personalize Introduction to Machine Learning Introduction to Amazon Lex Introduction to Amazon Polly Introduction to Amazon Rekognition AWS Foundations: How Amazon SageMaker Can Help The Machine Learning Process Anomaly Detection on AWS Machine Learning for Leaders Introduction to AWS Marketplace - Machine Learning Category Introduction to Amazon Comprehend Medical Introduction to Amazon Forecast Introduction to Amazon SageMaker Neo Introduction to Amazon Translate Introduction to Amazon Transcribe Introduction to Amazon API Gateway AWS Lambda Function Security & Defense in Depth Introduction to Amazon FSx for Lustre Introduction to Amazon FSx for Windows File Server Introduction to AWS Device Farm Introduction to AWS Mobile Hub Introduction to AWS Mobile SDK Introduction to Amazon Pinpoint AWS Mobile Service Overview AWS Managed Services Console Walkthrough Introduction to AWS OpsWorks for Chef Automate Introduction to AWS Organizations Introduction to AWS CloudFormation Introduction to Amazon CloudWatch Logs Introduction to Amazon CloudWatch Introduction to AWS Management Console Introduction to AWS OpsWorks Stacks Introduction to AWS Trusted Advisor Introduction to AWS Service Catalog Introduction to Amazon CloudWatch Logs Insights Introduction to AWS Application Discovery Service AWS Foundations: Strategies and Tools to Perform Large-Scale Migrations Introduction to Amazon Route 53 Introduction to Amazon Elastic Load Balancer - Classic Introduction to Amazon CloudFront Introduction to Amazon Direct Connect Network Ninja to Cloud Ninja Understanding CIDR Notation Instance Isolation with Elastic Network Interfaces Subnets, Gateways, and Route Tables Explained Introduction to AWS Global Accelerator Introduction to Amazon Route 53 Resolver Introduction to Amazon Virtual Private Cloud (VPC) Introduction to Amazon Inspector Introduction to AWS Artifact Introduction to Amazon Cloud Directory Introduction to AWS Identity and Access Management (IAM) Introduction to Amazon Macie Introduction to AWS Security Token Services (STS) Introduction to Data Encryption Differences Between Security Groups and NACLs Understanding Amazon EBS Volume Encryption Protecting Your Instance with Security Groups AWS Shared Responsibility Model Protect Your Web-facing Workloads with AWS Security Services Introduction to Amazon Certificate Manager Private Certificate Authority AWS Foundations: Cost Management Detect Anomalies in Game Transactions with ML and Sagemaker Introduction to AWS Ground Station AWS Development Tools Services Overview Build a Text Classification Model with AWS Glue and Amazon SageMaker AWS Foundations: Machine Learning Basics Migrating to AWS: A high level introduction Amazon Quantum Ledger Database (QLDB) Service Introduction AWS Foundations: Getting Started with the AWS Cloud Essentials AWS Certified SysOps Administrator - Associate Official Practice Question Set (SOA-C02 - English) Welcome to Solutions Architect Associate Exam Prep Multi-tier Architecture Solutions Multi-tier Architecture Solutions: Question Walkthrough High Availability and Fault Tolerance High Availability and Fault Tolerance: Question Walkthrough Decoupling Mechanisms Decoupling Mechanisms: Question Walkthrough Resilient Storage Resilient Storage: Question Walkthrough Design Resilient Architectures: Close Elastic and Scalable Compute Solutions for a Workload Elastic and Scalable Compute Solutions for a Workload: Question Walkthrough High-performing Networking Solutions for a Workload High-performing Networking Solutions for a Workload: Question Walkthrough High-performing Database Solutions for a Workload High-performing Database Solutions for a Workload: Question Walkthrough Design High-performing Architectures: Close Secure Resource Access Secure Application Tiers Secure Application Tiers: Question Walkthrough Data Security Options Data Security Options: Question Walkthrough Design Secure Applications and Architectures: Close AWS Cloud Economics for Startups Introduction to Blockchain Amazon Honeycode Essentials Getting Started with Amazon Personalize Let's Build in Amazon Honeycode SAP on AWS (Technical) AWS Cloud Essentials for Business Leaders Job Roles in the Cloud AWS Compute Services Overview Amazon EC2 Basics Deploying and Scaling Applications with Amazon Lightsail Installing AWS Outposts Servers Amazon Connect: Creating and Managing Amazon Connect Instances Introduction to Amazon Connect and the Connect Control Panel (CCP) Amazon Connect: Introduction to the Administrative Interface AWS re:Post | Guidance for Community Users Amazon Redshift Service Primer Exam Readiness: AWS Certified Data Analytics - Specialty Getting Started with AWS Glue Amazon Aurora Service Primer Amazon DocumentDB Service Primer Amazon DynamoDB Service Primer Amazon ElastiCache Service Primer Amazon Neptune Service Primer Amazon Quantum Ledger Database (QLDB) Service Primer Amazon RDS Service Primer Breaking Free from Legacy Databases Migrating from Oracle to Amazon Aurora Migrating from Microsoft SQL Server to Amazon DynamoDB Exam Readiness: AWS Certified Database - Specialty Getting Started with Amazon DocumentDB (with MongoDB compatibility) Getting Started with Amazon MemoryDB for Redis Getting Started with Amazon RDS for MariaDB Introduction to Database Migration PostgreSQL Fundamentals: Architecture PostgreSQL Fundamentals: Explain PostgreSQL Fundamentals: SQL Command Line PostgreSQL Fundamentals Using the AWS Schema Conversion Tool Migrating from Microsoft SQL Server to Amazon RDS Migrating from Oracle to Amazon RDS Migrating from MySQL to Amazon RDS Migrating from PostgreSQL to Amazon RDS Migrating from MongoDB to Amazon DocumentDB Migrating from Apache Cassandra to Amazon Keyspaces Migrating from Redis to Amazon ElastiCache Getting Started with .NET on AWS Getting Started with Amazon Location Service Getting Started with DevOps on AWS Improve Code Quality with Amazon CodeGuru Reviewer Getting Started with AWS for Games – Part II Getting Started with AWS for Games – Part I Managing AWS IoT Devices: Fleet Indexing IoT Edge Computing: Introduction to AWS Greengrass Getting Started with AWS IoT IoT Edge Computing: Amazon FreeRTOS Primer IoT Microcontrollers: Onboarding an ESP32 with Amazon FreeRTOS IoT Microcontrollers: Onboarding a Raspberry Pi Using AWS Greengrass IoT Foundation: Telemetry AWS DeepRacer: Driven by Reinforcement Learning Building a Machine Learning Ready Organization Introduction to Machine Learning: Art of the Possible Math for Machine Learning Planning a Machine Learning Project AWS Managed Services (AMS): Access Management AWS Managed Services (AMS): Accounts and Networking Overview ServiceNow Connector Application AWS Managed Services (AMS): Application Onboarding AWS Managed Services (AMS): Change Management Overview AWS Managed Services (AMS): Incident Management Overview AWS Managed Services (AMS): Introduction AWS Managed Services (AMS) Managed AWS Landing Zone AWS Managed Services (AMS): Onboarding AWS Managed Services (AMS): Patch Management Overview AWS Managed Services (AMS): Readiness AWS Managed Services (AMS): Security Management Overview Getting Started with AWS CloudFormation Troubleshooting: AWS CloudFormation Stacks Getting Started with AWS CloudTrail Getting Started with AWS Config Getting Started with AWS Systems Manager AWS Elemental Link - Getting Started AWS Elemental Live - Foundations AWS Elemental Statmux Introduction to AWS Media Services by Use Case Media Glossary Video Streaming Concepts: AWS Media Services Migration & Transfer Getting Started with Network Load Balancer (NLB) Configure and Deploy AWS PrivateLink Exam Readiness: AWS Certified Security - Specialty Cloud Audit Academy - Cloud Agnostic Getting Started with AWS Security, Identity, and Compliance Amazon API Gateway for Serverless Applications Amazon DynamoDB for Serverless Architectures AWS Lambda Foundations Introduction to Step Functions Amazon Elastic File System (Amazon EFS) Primer Amazon FSx for Lustre Primer Amazon FSx for NetApp ONTAP Primer Amazon FSx for Windows File Server Primer Amazon Simple Storage Service (Amazon S3) Storage Classes Deep Dive AWS DataSync Primer AWS Network Connectivity Options Exam Readiness: AWS Certified Solutions Architect – Professional Introduction to AWS Solutions Getting Started with Amazon EMR Getting Started with Cloud Acquisition Introduction to Cloud Adoption Framework Cost-effective Storage Solutions Cost-effective Storage Solutions: Question Walkthrough Cost-effective Compute and Database Services Cost-effective Compute and Database Services: Question Walkthrough Cost-optimized Network Architectures Cost-optimized Network Architectures: Question Walkthrough Design Cost-optimized Architectures: Close Certified Solutions Architect - Associate Exam Prep: Course Close AWS Cloud Essentials for Business Leaders (Financial Services) AWS Certified Cloud Practitioner Official Practice Question Set (CLF-C01 - English) Getting Started with Amazon Redshift Automatically Detect and Mitigate Account Compromise Issues Optimizing your FinOps Strategy with AWS Threat Modeling the Right Way for Builders Workshop AWS Certified Solutions Architect – Associate Official Practice Question Set (SAA-C03 - English) Getting Started with Amazon ECS Getting Started with AWS Fargate Selecting your Data Migration Strategy with AWS Getting Started with Amazon Keyspaces Getting Started with Amazon GuardDuty Getting Started with Amazon ECR Getting Started with Amazon EKS Anywhere Getting Started with Migration Hub Refactor Spaces Getting Started with Amazon Neptune Getting Started with Amazon Detective Introduction to Amazon Ads Use Sponsored Ads to Help Grow Your Brand The Elements of Data Science AWS Certified Developer - Associate Official Question Set (DVA-C02 - English) Getting Started with Gateway Load Balancer Getting Started with Amazon Timestream Basics of AWS Managed Services (AMS) Getting Started with Amazon ElastiCache Data Analytics Fundamentals Introduction to Amazon Comprehend Introduction to Amazon SageMaker AWS Marketplace Overview Authentication and Authorization with AWS Identity and Access Management AWS Application Services Overview AWS Application Migration Service (AWS MGN) – A Technical Introduction Getting Started with Application Load Balancer Getting Started with AWS Security Hub Introduction to AWS Resilience Hub Approach to Mainframe Migration and Modernization Mainframe Modernization Patterns and Best Practices Getting Started with Amazon Textract Getting Started with AWS Control Tower Getting Started with AWS IoT SiteWise AWS Cloud Economics for Healthcare Getting Started with AWS Audit Manager Getting Started with Amazon QuickSight AWS Certification Subject Matter Expert Training Getting Started with AWS Cloud Essentials AWS Free Tier: Introduction to Monitoring Services AWS Free Tier: Introduction to Offerings AWS Free Tier: Introduction to Managing Services Getting Started with Bottlerocket Getting Started with AWS Mainframe Modernization Refactor with AWS Blu Age Getting Started with AWS Mainframe Modernization Service Introduction to Robotics on AWS Getting Started with Amazon Managed Service for Prometheus Using AWS Solutions: AWS Cloud Migration Factory CloudEndure Migration Training - Technical Configuring and Deploying VPCs with Multiple Subnets Getting Started with Amazon OpenSearch Service AWS Database Migration Service (AWS DMS) Getting Started AWS Cloud Economics for Banking AWS Cloud Essentials for Business Leaders - Telecommunications The Cloud Architect Role in the AWS Cloud Sustainability Transformation with AWS Amazon Macie - Getting Started Succeeding in the Cloud- Rethinking your Levers AWS Billing and Cost Management Getting into the Serverless Mindset Introduction to Serverless Development Amazon Inspector - Getting Started AWS Edge Storage, Data Transfer, and File Transfer Services Getting Started AWS Storage Data Protection Services Getting Started AWS File Storage Services Getting Started AWS Hybrid Storage Services Getting Started AWS Object Storage Services Getting Started AWS Block Storage Services Getting Started AWS Storage Services - Portfolio Introduction AWS Tools to Develop, Run, and Modernize .NET Workloads Migrating SAP Workloads to AWS Amazon GameSparks - Getting Started Amazon Kinesis Video Streams - Getting Started Amazon CodeWhisperer - Getting Started Amazon Managed Grafana - Getting Started AWS Technical Essentials AWS Cloud Practitioner Essentials AWS Networking Basics Amazon Transcribe Getting Started Amazon Kendra Getting Started Introduction to the Cloud for Clinicians AWS Migration Evaluator Getting Started Introduction to AWS Elemental MediaConnect Amazon Braket Getting Started Cloud Essentials for Business Leaders – Healthcare and Life Sciences Planning a Generative AI Project Microsoft on AWS - Porting Assistant for .NET Deploying Applications with AWS Elastic Beanstalk Amazon Bedrock Getting Started AWS FinOps - Creating Cloud Business KPIs (Unit Economics) Building a Generative AI-Ready Organization Introduction to Building with AWS Databases Choosing Serverless Containers for .NET Trails for AWS CloudTrail Getting Started AWS Organizations Getting Started Amazon EMR Getting Started AWS Glue Getting Started Cloud Essentials for Business Leaders - Education Cloud for CHROs Amazon Lex Getting Started AWS X-Ray Getting Started AWS Wickr Getting Started AWS Security – Encryption Fundamentals Introduction to Generative AI - Art of the Possible AWS Skill Builder Learner Guide Amazon CloudWatch Getting Started AWS Mainframe Modernization Replatform with Micro Focus Getting Started Fundamentals of Analytics on AWS - Part 1 Fundamentals of Analytics on AWS - Part 2 AWS CloudTrail Lake Getting Started Introduction to AWS Application Migration Service Securely Connecting AWS IoT Devices to the Cloud Practical Demo of Amazon Q and Amazon Bedrock Hands-On Demonstration of Amazon Q for Business Use Unleashing Innovation: The Generative AI Revolution Amazon Connect Customer Profiles Fundamentals AWS Managed Services (AMS): Advanced Self Service Reporting AWS Managed Services (AMS) Gameday Fundamentals AWS for SAP Fundamentals AWS Managed Service (AMS) - Advanced Operational Integration AWS Managed Services (AMS): Logging and Monitoring AWS for RISE with SAP Introduction Amazon Connect Chat and Messaging Fundamentals Decarbonization with AWS Introduction Amazon Connect Instance Fundamentals Amazon Redshift Introduction Amazon Connect Agent Applications Fundamentals Amazon Security Lake Getting Started Amazon Q Business Getting Started Amazon Q Introduction AWS Application Migration Service Getting Started IBM z/OS Essentials (Technical) Amazon Q Developer Getting Started Generative BI with Amazon Q in Quicksight - Getting Started Amazon Connect Introduction Amazon Connect Console Fundamentals Security, Compliance, and Governance for AI Solutions Optimizing Foundation Models Essentials of Prompt Engineering Developing Generative Artificial Intelligence Solutions Developing Machine Learning Solutions Responsible Artificial Intelligence Practices Fundamentals of Machine Learning and Artificial Intelligence Exploring Artificial Intelligence Use Cases and Applications AWS Flash - Generative AI in Action: Real-World Use Cases AWS Flash - Introduction to Responsible AI AWS Flash - Chalk Talks: Generative AI on AWS AWS Flash – Migrating VMware Workloads to AWS Amazon Connect Flows Fundamentals Amazon Connect Conversational Interfaces Fundamentals Amazon Connect Contact Lens Fundamentals Amazon Connect Routing Fundamentals Amazon DevOps Guru Getting Started AWS Flash - SaaS Technical Fundamentals AWS Flash - Introduction to Cost Management for SaaS AWS Flash – Introduction to SaaS Pricing and Packaging AWS Skills Centers: Becoming a Cloud Practitioner - Part 4 - Advanced Cloud Services AWS Skills Centers: Becoming a Cloud Practitioner - Part 3 - Identities, Security, and Monitoring the AWS Cloud AWS Skills Centers: Becoming a Cloud Practitioner - Part 2 - Compute, Networking, and Account Strategies AWS for Media & Entertainment Post-Production Workflow Essentials AWS for Media & Entertainment Content Production Concepts and Roles AWS for Media & Entertainment Content Production Security Essentials AWS for Media & Entertainment Content Production Workstation Design AWS for Media & Entertainment Content Production Workstation Requirements Amazon Connect Flows Lambda Integrations Fundamentals Amazon Connect Custom Contact Control Panel Fundamentals Amazon Connect - Infrastructure as Code Fundamentals Amazon Connect Development Fundamentals AWS Skills Centers: Becoming a Cloud Practitioner - Part 1 - Cloud Basics AWS IPv6 Fundamentals and VPC Connectivity AWS Flash - Cloud Financial Management: FinOps fundamentals & strategies (Part 1) AWS Flash - Cloud Financial Management: FinOps Fundamentals & Strategies (Part 2) AWS Flash - Cost Optimization Solutions for FinOps (Part 1) AWS Flash – Cloud Migration for Small Business Owners AWS Flash – Cybersecurity for Small Business Owners AWS Flash - SaaS Business Fundamentals Innovation and Transformation - Amazon’s Culture of Innovation Overview Innovation and Transformation - Working Backwards

Arrow-left icon Home

PostgreSQL Fundamentals: Explain

Free

Training

PostgreSQL Fundamentals: Explain

In this course, you will learn how to use the EXPLAIN command to gain insight into the execution of your SQL query. This includes how long your query would run, and how many resources it would consume.

Prerequisites: Taken the PostgreSQL Fundamentals course
Shareable certificate - Add to your LinkedIn account
Skill level: Fundamental Time required: 0 hour 30 minutes
Get Certificate Badge icon

You Will Learn

Subtract Icon

Understand output of the EXPLAIN ANALYZE command

Subtract Icon

Understand output of the EXPLAIN command

Who is it for

Database engineers

Database developers

Database architects

Database administrators

What Others Say

Profile picture
Cornelius K.
4 Star

I find the continuous layout and the structured structure in the descriptions very good. So you can find a lot of information very quickly.

Profile picture
Tiger S.
5 Star

Hello friends, I believe that you have obtained the w3school certificate and will be successful anywhere in the world. I have learned more from this place, thank you.

Profile picture
Ali H.
5 Star

Learning more than expectation . W3school is a Great mentor .

More AWS Training

Most popular Browse all
Training
AWS Cloud Practitioner Essentials
Fundamental
6h
This course teaches you about the Amazon Web Services (AWS) Cloud. You'll learn how the AWS Cloud works, what services it offers, how to keep it safe, how much it costs, and how to get help. You will be introduced to the various types of clouds and why using AWS and its primary services is beneficial. You'll also learn how to use AWS in different ways and ensure it's secure.
Free
Training
Getting Started with Cloud Acquisition
Fundamental
1h 20min
In this course, you will learn to buy AWS cloud. The course will cover an in-depth review of cloud acquisition best practices, the advantages of working with the AWS Partner Network (APN), and how to beat common challenges.
Free
Training
Introduction to AWS Solutions
Fundamental
45min
In this course, you will explore AWS Solutions' capabilities and how they can benefit your customers. You will get introduced to ways you can save time and minimize development efforts by utilizing AWS Solutions for a variety of technical and business difficulties. You will also be provided with brief knowledge checks at the end of each module as well as a final exam.
Free
Browse all

Details to know

PLUS
SPACES
GET CERTIFIED
FOR TEACHERS
FOR BUSINESS
CONTACT US
×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
sales@w3schools.com

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
help@w3schools.com

Top Tutorials
HTML Tutorial
CSS Tutorial
JavaScript Tutorial
How To Tutorial
SQL Tutorial
Python Tutorial
W3.CSS Tutorial
Bootstrap Tutorial
PHP Tutorial
Java Tutorial
C++ Tutorial
jQuery Tutorial
Top References
HTML Reference
CSS Reference
JavaScript Reference
SQL Reference
Python Reference
W3.CSS Reference
Bootstrap Reference
PHP Reference
HTML Colors
Java Reference
Angular Reference
jQuery Reference
Top Examples
HTML Examples
CSS Examples
JavaScript Examples
How To Examples
SQL Examples
Python Examples
W3.CSS Examples
Bootstrap Examples
PHP Examples
Java Examples
XML Examples
jQuery Examples
Get Certified
 HTML Certificate
CSS Certificate
JavaScript Certificate
Front End Certificate
SQL Certificate
Python Certificate
PHP Certificate
jQuery Certificate
Java Certificate
C++ Certificate
C# Certificate
XML Certificate
FORUM ABOUT ACADEMY
W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness
of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2025 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.