SQL<p><strong>SQL</strong> is the standard query language for relational databases, used to define schemas, query data, join tables, aggregate results, update records, and support reporting or application data access.</p><p><strong>Additional Resources</strong>:</p><ul><li><a href="https://en.wikipedia.org/wiki/SQL" target="_blank" rel="noopener">SQL overview</a></li><li><a href="https://www.postgresql.org/docs/current/sql.html" target="_blank" rel="noopener">PostgreSQL SQL syntax</a></li><li><a href="https://learn.microsoft.com/en-us/sql/t-sql/language-reference" target="_blank" rel="noopener">SQL Server language reference</a></li></ul>