- First draft of current WIP

src/Query/GroupBy.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Ulmus\Query;
+
+class GroupBy extends Fragment {
+    public int $order = 70;
+
+    public array $groupBy = [];
+
+    public function set(array $order) : self
+    {
+        $this->groupBy = $order;
+        return $this;
+    }
+
+    public function add(string $field, ? string $direction = null) : self
+    {
+        $this->groupBy[] = $field;
+        return $this;
+    }
+
+    public function render() : string
+    {
+        return $this->renderSegments([
+            'GROUP BY', implode(", ", $this->groupBy)
+        ]);
+    }
+
+}