ts">supported-stats</a> </li><li> <a href="tech.v3.dataset.column.html#var-to-double-array">to-double-array</a> </li><li> <a href="tech.v3.dataset.column.html#var-union-missing-sets">union-missing-sets</a> </li><li> <a href="tech.v3.dataset.column.html#var-unique">unique</a> </li></ul></div></div><div class="namespace"><h3><a href="tech.v3.dataset.column-filters.html">tech.v3.dataset.column-filters</a></h3><div class="doc"><div class="markdown"><p>Queries to select column subsets that have various properite