8Displaying Data from Multiple Tables
CERTIFICATION OBJECTIVES
8.02 Join a Table to Itself by Using a Self-Join
8.03 Generate a Cartesian Product of All Rows from Two or More Tables
This chapter reviews various types of joins. A join is a SELECT statement that retrieves data from two or more tables and connects that data together to produce a combined set of output. The SELECT statement specifies data in one table that is identical to data ...
Get OCA Oracle Database SQL Certified Expert Exam Guide (Exam 1Z0-047) now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.