Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

SQL is neither the fastest nor the most elegant way to talk to databases, but it is the best way we have. Here’s why Today, Structured Query Language is the standard means of manipulating and ...

(If your select statement is merely necessary to determine if you should do an update or not, it should just be returning a single value and not any data at all).<BR><BR>3.

In this challenge you will write an SQL SELECT query that joins various tables to figure out what titles each author has published at which publishers. Your output should have at least the following ...