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    <p>I would change the reviser's wording to:</p> <blockquote> <p>It should be clear that to avoid SQL Injection, the application should use prepared statements, escape input, or filter application data before interpolating into an SQL string.</p> </blockquote> <p>It's not necessary to escape a value if you're going to pass as a parameter. In fact, you should not, because you'll insert literal backslashes into your data.</p> <p>You need to interpolate strings into your SQL statement when you can't use a query parameter. Examples include:</p> <ul> <li><p>Table names and column names, which have their <a href="https://stackoverflow.com/questions/214309/do-different-databases-use-different-name-quote/214344#214344">own syntax for delimited identifiers</a>. These must be part of the SQL query at prepare time, so the RDBMS can parse and validate them.</p></li> <li><p>SQL keywords, which should be sanitized but cannot be escaped because they are not delimited.</p></li> <li><p>Other syntax or expressions.</p></li> <li><p>Some cases where literal values must be provided at prepare time, e.g. MySQL's fulltext functions do not support parameters for the search pattern.</p></li> </ul> <p>Stored procedures are not a defense against SQL injection. You can prepare and execute unsafe dynamic SQL statements inside a stored procedure. See <a href="http://thedailywtf.com/Articles/For-the-Ease-of-Maintenance.aspx" rel="nofollow noreferrer">http://thedailywtf.com/Articles/For-the-Ease-of-Maintenance.aspx</a> for a great story about that.</p> <p>I cover all these cases in my presentation <a href="http://www.slideshare.net/billkarwin/sql-injection-myths-and-fallacies" rel="nofollow noreferrer">SQL Injection Myths and Fallacies</a>. That may be a helpful resource for you.</p> <p>I also cover SQL injection defense in a chapter of my book, <a href="http://pragprog.com/book/bksqla/sql-antipatterns" rel="nofollow noreferrer">SQL Antipatterns: Avoiding the Pitfalls of Database Programming</a>.</p>
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    1. COthanks. Really good stuff.
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