Nested Scalar Queries
Explore how to write nested scalar queries in SQL, allowing you to embed one query within another for more expressive and readable database operations. Understand scenarios where nested queries are essential for obtaining precise information, including how to handle scalar values and the advantages over join queries.
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Nested Queries
In this lesson we’ll examine nested queries, a query within another query. With the ability to nest a query, we can combine queries to get the desired result in a single uber query rather than executing each constituent query individually. Nested queries are generally slower but more readable and expressive than equivalent join queries. Also, in some situations nested queries are the only way to retrieve desired information from a database.
Connect to the terminal below by clicking in the widget. Once connected, the command line prompt will show up. Enter or copy and paste the command ...