Welcome to the SQL Tutorial
Learn to answer questions with data using SQL. No coding experience necessary.
Basic SQL
Lesson 1
The SQL Tutorial for Data Analysis
Learn to answer questions with data to solve challenging problems.
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Using SQL in Mode
Learn to use Mode's Query Editor to run SQL queries against data in a relational database.
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SQL SELECT
The SQL SELECT statement is used to retrieve data from a database based on criteria specified in the query.
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SQL LIMIT
Use the SQL LIMIT command to restrict how many rows a SQL query returns.
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SQL WHERE
Use the SQL WHERE clause to filter data.
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SQL Comparison Operators
Use SQL comparison operators like =, <, and, > to filter numerical and non-numerical data.
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SQL Logical Operators
SQL logical operators allow you to filter results using several conditions at once.
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SQL LIKE
An introduction to the LIKE operator, which matches similar values.
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SQL IN
Use the SQL IN operator in the WHERE clause to filter data by a list of values.
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SQL BETWEEN
Use the SQL BETWEEN operator to select values from a specific range.
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SQL IS NULL
Use SQL's IS NULL operator to select rows that have no data in a given column.
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SQL AND
Use the SQL AND operator to select rows that satisfy two or more conditions.
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SQL OR
Use the SQL OR operator to select rows that satisfy either of two conditions.
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SQL NOT
Use the SQL NOT operator to select rows for which a certain conditional statement is false.
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SQL ORDER BY
See code and examples of using SQL ORDER BY to sort data.
Start NowIntermediate SQL
Lesson 1
SQL Aggregate Functions
Aggregate data across entire columns using the COUNT, SUM, MIN, MAX, and AVG functions.
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SQL COUNT
Using SQL COUNT to count the number of rows in a particular column.
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SQL SUM
Use the SQL SUM function to total the numerical values in a particular column.
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SQL MIN/MAX
See examples using the SQL MIN and MAX functions to select the highest and lowest values in a particular column.
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SQL AVG
Using the SQL AVG function to select the average of a selected group of values.
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SQL GROUP BY
Use the GROUP BY clause to separate data into groups
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SQL HAVING
Use the SQL HAVING clause to filter an aggregated query.
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SQL DISTINCT
Using SQL DISTINCT to view and aggregate unique values in a given column.
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SQL CASE
Using if/then logic with the SQL CASE statement.
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SQL Joins
An introduction to SQL joins and the relational logic behind them.
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SQL INNER JOIN
Use a SQL INNER JOIN to select rows that satisfy a join statement and eliminate rows that don't.
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SQL Outer Joins
This lesson of the SQL tutorial for data analysis introduces the concept of outer joins.
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SQL LEFT JOIN
See code and examples for LEFT JOIN.
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SQL RIGHT JOIN
See code and examples for RIGHT JOIN.
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SQL Joins Using WHERE or ON
Learn the differences between filtering joined data using WHERE or ON
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SQL FULL OUTER JOIN
Learn about SQL FULL OUTER JOIN, which returns unmatched rows from both tables being joined.
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SQL UNION
UNION allows you to stack one dataset on top of another dataset.
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SQL Joins with Comparison Operators
Use comparison operators with SQL joins, which is especially helpful for defining date ranges.
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SQL Joins on Multiple Keys
Learn to join tables on multiple keys to boost performance and make SQL queries run faster.
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SQL Self Joins
Learn the situations where you might want to join a table to itself, and how to do so.
Start NowAdvanced SQL
Lesson 1
SQL Data Types
Learn about SQL data types and how to change a column's data type using CONVERT and CAST.
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SQL Date Format
Learn how dates and times are formatted in SQL, and best practices for interacting with them.
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Data Wrangling with SQL
Programmatically transform data into a format that makes it easier to work with.
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Using SQL String Functions to Clean Data
Use SQL string functions to clean data strings and fix date formats.
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Writing Subqueries in SQL
Use subqueries in SQL with aggregate functions, conditional logic, and joins.
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SQL Window Functions
Learn about SQL windowing functions such as ROW_NUMBER(), NTILE, LAG, and LEAD.
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Performance Tuning SQL Queries
Learn how to conduct SQL performance tuning by reducing table size, simplifying joins, and the EXPLAIN command.
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Pivoting Data in SQL
Learn to pivot rows to columns and columns to rows in SQL.
Start NowSQL Analytics Training
Lesson 1
About Analytics Training
Hone your analytical skills by solving real-world cases from analytics teams at data-driven companies.
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Investigating a Drop in User Engagement
Investigating a drop in user engagement with your product.
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Investigating a Drop in User Engagement: Answers
The answer to the problem of investigating a drop in user engagement with your product.
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Understanding Search Functionality
How to understand in-product search functionality.
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Understanding Search Functionality: Answers
Answers how to understand in-product search functionality and if it's worth investing in.
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Validating A/B Test Results
How to validate A/B testing results.
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Validating A/B Test Results: Answers
Answers how to validate A/B testing results.
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SQL Tutorial Conclusion
You're more than ready to apply your skills to real analytical problems. On to the next step.
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