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In the Subqueries chapter(Chapter 9), the author says "Subqueries are a powerful tool that you can use in all four SQL data statements". I don't understand what is meant by "all four SQL data statements". Does it mean CRUD?
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Learning SQL 2nd Ed1 Reply
This is an excerpt from another website that describes the four basic types of SQL statements:
SQL commands fall into one of 4 categories: SELECT - Retrieving data from one or more tables INSERT - Adding rows to a table UPDATE - Modifying existing rows in a table DELETE - Deleting one or more rows from a table Website: http://www.sql-serve...l-commands.html
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