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In this chapter, read examples and sample code for the types of problems that SQL subqueries can solve, including star transformation, generating a table from which to SELECT, generating rows to be passed to a DML statement and more.
This chapter excerpt explains how to use and write single-row and multiple-row subqueries in SQL, with sample code and exercises.
A correlated subquery is a SQL query that depends on values executed by the outer query in order to complete.
This chapter of "OCA Oracle Database 11g: SQL Fundamentals I Exam Guide" explains how a subquery, a query that is nested inside a SELECT, INSERT, UPDATE, or DELETE statement or inside another subquery, is defined and used in SQL.
In this chapter, learn about the three broad divisions of a subquery in SQL: Single-row, multiple-row and correlated subqueries.
When comparing subqueries and joins, which one is faster?
What is subquery and correlated subquery? What is the difference between them?
Remote data backup is the process of backing up data created by remote and branch offices (ROBOs) and storing it securely. Businesses with ROBOs require backup and recovery solutions that can support the company's data protection policies and business service levels.