sql for data science tutorial w3schools

SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in MySQL, SQL Server, MS Access, Oracle, PostgreSQL, and more.

W3Schools

w3schools.com › sql › sql_intro.asp

SQL Introduction

String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DA

Discussions

Is the W3Schools SQL course worth paying for, or are there better options out there for learning SQL effectively?

W3schools has a pay option?? It used to be my goto for free training. You don’t need that SQL hosting to learn anything. Just go through the free tutorial. It doesn’t have advanced concepts. If you have a computer at home, you can always install MariaDB or MySQL to practice. More on reddit.com

r/dataanalysis

15

7

May 9, 2025

Is the W3Schools SQL course worth paying for, or are there better options out there for learning SQL effectively?

Currently doing the free course for W3schools, as was recommended to me on this sub reddit. It does a great job at walking you through and giving you tests & examples. I combine it with https://www.sql-practice.com/ and a sql textbook. The website gives you questions and a real database to try and query. More on reddit.com

r/SQL

21

32

May 9, 2025

Is W3 schools SQL enough to get a job?

It's hard to tell, especially without knowing anything about the organisation at all but some kind of benchmark would be to see how well you can answer your way through DP-203 (or maybe DP-900, in your case?) questions. I suppose you could more or less ignore the Azure specific questions if you aren't going to use it but there are a bunch of good SQL questions sprinkled in there as well; https://www.examtopics.com/exams/microsoft/dp-203/view/ Edit: If you manage to get through DP-203 it'll definitely be enough for a lot of database related work tasks. More on reddit.com

r/learnSQL

9

14

August 11, 2022

how much SQL do data scientists need to know?

The more the better. It's pretty straightforward to pick up the basics and not too hard to figure out extras like window functions and CTEs. More on reddit.com

r/datascience

188

215

June 5, 2023

Videos

15:19

YouTube

Learn SQL as a beginner with W3schools|| Data Analysis and Science.

SQL - SELECT Statement - W3Schools.com - YouTube

July 29, 2024

03:14

YouTube

SQL - Introduction - W3Schools.com - YouTube

SQL Tutorial - The Very Basics, Part 1 - W3 Schools - YouTube

SQL for Data Analytics – Intermediate Course + Project - YouTube

March 31, 2025

01:05:48:28

YouTube

SQL Full Course for Beginners (30 Hours) – From Zero to Hero ...

March 27, 2025

View all

W3Schools

w3schools.com › sql › sql_syllabus.asp

SQL Syllabus (Curriculum)

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

W3Schools

w3schools.com › mysql › mysql_sql.asp

MySQL SQL

SQL is used to insert, search, update, and delete database records. The following SQL statement selects all the records from the "Customers" table: ... In this tutorial we will write all SQL keywords in upper-case.

W3Schools

w3schools.com › MYSQL › default.asp

MySQL Tutorial

MySQL is a widely used relational database management system (RDBMS). MySQL is free and open-source. MySQL is known for being fast, reliable, scalable, and easy to use, and is ideal for both small and large applications. ... Get certified with our MySQL exam, includes a professionally curated study kit to guide you from beginner to exam-ready. ... With our online MySQL editor, you can edit the SQL statements, and click on a button to view the result.

W3Schools

w3schools.com › sql › sql_exercises.asp

SQL Exercises

String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DA

W3Schools

w3schools.com › datascience

Data Science Tutorial

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

W3Schools

w3schools.com › bootcamp › sql.php

SQL Bootcamp - W3Schools Bootcamps

Absolutely! The SQL Bootcamp provides a solid foundation for data analysis and backend development. You can combine it with our Python Bootcamp for data science, or explore the comprehensive Web Development Bootcamp to expand your skills further.

Find elsewhere

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KDnuggets

kdnuggets.com › 2022 › 04 › 7-steps-mastering-sql-data-science.html

7 Steps to Mastering SQL for Data Science - KDnuggets

April 26, 2022 - After that, you can immediately start learning how to query data in SQL. I highly recommend following along to these tutorials by W3Schools to learn the following commands — SELECT, IN, WHERE, BETWEEN, AND, OR, NOT, LIKE.

DataLemur

datalemur.com › sql-tutorial › intro-to-sql

SQL Tutorial for Data Science [Start Here]

The basic SQL lessons are meant for SQL newbies, who might have used Excel but don't have formal coding experience. The intermediate SQL lesons are meant for those who have played around with SQL, but want to become productive at SQL.

W3Schools

w3schools.com › bootcamp › bootcamp_python.php

W3Schools Data Analytics Bootcamp

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 SWIFT ANGULAR ANGULARJS GIT POSTGRESQL MONGODB ASP AI R GO KOTLIN SWIFT SASS VUE GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE INTRO TO PROGRAMMING HTML & CSS BASH RUST ... How to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems · How NumPy can be used for arrays in statistics and math

reddit.com › r/dataanalysis › is the w3schools sql course worth paying for, or are there better options out there for learning sql effectively?

r/dataanalysis on Reddit: Is the W3Schools SQL course worth paying for, or are there better options out there for learning SQL effectively?

May 9, 2025 -

I'm trying to build a strong foundation in SQL for data analytics and career purposes. I came across the W3Schools SQL course, which seems beginner-friendly and affordable. But before I invest in it, I want to know:

Is it detailed enough for practical, job-oriented skills?

Does it cover real-world projects or just basic syntax?

Are there better alternatives (like free or paid courses on Udemy, Coursera, etc.)?

I'd appreciate honest feedback from anyone who's taken it or has experience learning SQL through other platforms. I want something that can take me from beginner to confident user, ideally with some hands-on practice.

Thanks in advance!

Top answer

1 of 8

15

W3schools has a pay option?? It used to be my goto for free training. You don’t need that SQL hosting to learn anything. Just go through the free tutorial. It doesn’t have advanced concepts. If you have a computer at home, you can always install MariaDB or MySQL to practice.

2 of 8

5

For hands on practice I always recommend SQL Zoo https://sqlzoo.net/wiki/SQL_Tutorial and SQL Bolt https://sqlbolt.com/lesson/select_queries_introduction

W3Schools

w3schools.com › SQL › sql_study_plan.asp

SQL Study Plan (Lesson Plan)

String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DA

GeeksforGeeks

geeksforgeeks.org › sql-for-data-science

SQL for Data Science - GeeksforGeeks

April 22, 2025 - This section introduces SQL as the foundational tool for data analysis in data science. It covers the basic concepts of relational databases, the structure of SQL queries, and the importance of SQL in extracting, manipulating, and storing data.

DataLemur

datalemur.com › sql-tutorial

Free SQL Tutorial for Data Analysts & Data Scientists

Analyze data, by category. ... Filter on groups with HAVING. ... Remove duplicates with DISTINCT. ... Do math with +, *, and %. ... Use ABS(), CEIL(), FLOOR(), and more! ... Divide & round numbers the right way. ... Find and fix pesky NULLs. ... Catch a CASE. ... Analyze two tables in one go. ... Learn to handle dates and timestamps. ... Let's go from good to great at SQL.

W3Schools

w3schools.com › sql › sql_bootcamp.asp

W3Schools SQL Bootcamp

Day Format Hour Minute Month MonthName ... Server SQL Syllabus SQL Study Plan SQL Bootcamp SQL Training ... In this bootcamp, you will learn the fundamentals of SQL. This powerful programming language is widely used in web development, ...

W3Schools

w3schools.in › sql › tutorials

SQL (Structured Query Language) Tutorial Index - W3Schools

SQL (Structured Query Language) is a standard database programming language used for accessing and manipulating data in a database. This SQL tutorial series will help you learn SQL from the basics.

W3Schools

w3schools.com › sql › sql_examples.asp

SQL Examples

String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE Date Functions: ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DA

W3Schools

w3schools.com › sql › sql_ref_database.asp

SQL DATABASE

SQL Create DB SQL Drop DB SQL Backup DB SQL Create Table SQL Drop Table SQL Alter Table SQL Constraints SQL Not Null SQL Unique SQL Primary Key SQL Foreign Key SQL Check SQL Default SQL Create Index SQL Auto Increment SQL Dates SQL Views SQL Injection SQL Parameters SQL Prepared Statements SQL Hosting ... ADD ADD CONSTRAINT ALL ALTER ALTER COLUMN ALTER TABLE ALTER VIEW AND ANY AS ASC BACKUP DATABASE BETWEEN CASE CHECK COLUMN CONSTRAINT CREATE CREATE DATABASE CREATE INDEX CREATE OR REPLACE VIEW CREATE TABLE CREATE PROCEDURE CREATE UNIQUE INDEX CREATE VIEW DATABASE DEFAULT DELETE DESC DISTINCT D

reddit.com › r/sql › is the w3schools sql course worth paying for, or are there better options out there for learning sql effectively?

r/SQL on Reddit: Is the W3Schools SQL course worth paying for, or are there better options out there for learning SQL effectively?

May 9, 2025 -

I'm trying to build a strong foundation in SQL for data analytics and career purposes. I came across the W3Schools SQL course, which seems beginner-friendly and affordable. But before I invest in it, I want to know:

Is it detailed enough for practical, job-oriented skills?

Does it cover real-world projects or just basic syntax?

Are there better alternatives (like free or paid courses on Udemy, Coursera, etc.)?

I'd appreciate honest feedback from anyone who's taken it or has experience learning SQL through other platforms. I want something that can take me from beginner to confident user, ideally with some hands-on practice.

Thanks in advance!