Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

A join combines two or more tables side by side. If you do not specify how to join the tables, you get a Cartesian product. This means that SQL combines each row from the first table with every row ...

In a three-way join, the sql-expression consists of two conditions: one relates the first table to the second table and the other relates the second table to the third table.

Right Join is used to join two tables and it return all rows from right table (table 2) and matching rows from table 1 (left table). The result is NULL for unmatched rows for table 1 (left table).

Learn how to write, debug, and optimize complex SQL queries with multiple tables and conditions. Follow these tips and best practices for database administration.

The phrase FROM Donors INNER JOIN DonationRecords ON tells SQL to find matching records between the two tables, based on the expression that follows the key word ON.

Write a solution to report the first name, last name, city, and state of each person in the Person table. If the address of a personId is not present in the Address table, report null instead. - Is ...