# SQL Features, Reserved and Key Words, and Compliance 

This section includes topics that identify SQL features and compliance in Greenplum Database:

-   [Summary of Greenplum Features](feature_summary.html)
-   [Reserved Identifiers and SQL Key Words](sql-keywords.html)
-   [SQL 2008 Optional Feature Compliance](SQL2008_support.html)

**Parent topic:** [Greenplum Database Reference Guide](ref_guide.html)

