d "><a href="../sql/data_types.html"><strong aria-hidden="true">2.4.</strong> SQL Data Types</a></li><li class="chapter-item expanded "><a href="../sql/operators.html"><strong aria-hidden="true">2.5.</strong> Operators</a></li><li class="chapter-item expanded "><a href="../sql/functions.html"><strong aria-hidden="true">2.6.</strong> Functions</a></li><li class="chapter-item expanded "><a href="../sql/time_queries.html"><strong aria-hidden="true">2.7.</strong> Time Queries</a></li><li class="chapter-item exp