Intermediate SQL Queries
Master the basics of querying tables in relational databases such as MySQL, SQL Server, and PostgreSQL.
SQL for Joining Data
Join two or three tables together into one, combine tables using set theory, and work with subqueries in PostgreSQL.
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What is SQL Used For? 7 Top SQL Uses
Discover the uses of SQL in industries and specific jobs. Plus, learn why the SQL language is so versatile and in demand.
SQL Window Functions Cheat Sheet
With this SQL Window Functions cheat sheet, you'll have a handy reference guide to the various types of window functions in SQL.
COALESCE SQL Function
COALESCE() is one of the handiest functions in SQL. Read this tutorial to learn how to master it.
FORMAT() SQL FUNCTION
FORMAT() is one of the most commonly used functions in SQL. Learn its main applications in this tutorial.
INSERT INTO SQL FUNCTION
INSERT INTO lets you add data to your tables. Learn how to use it in this tutorial.
COUNT() SQL FUNCTION
COUNT() lets you count the number of rows that match certain conditions. Learn how to use it in this tutorial.