diff --git a/src/Database/Table/GroupedSelection.php b/src/Database/Table/GroupedSelection.php
index e6ae366ba..710910795 100644
--- a/src/Database/Table/GroupedSelection.php
+++ b/src/Database/Table/GroupedSelection.php
@@ -85,6 +85,15 @@ public function order($columns)
 	}
 
 
+	public function group($columns)
+	{
+		$this->emptyResultSet();
+		$columns .= ", $this->name.$this->column";
+		$this->sqlBuilder->setGroup($columns);
+		return $this;
+	}
+
+
 	/********************* aggregations ****************d*g**/
 
 
diff --git a/tests/Database/Table/GroupedSelection.group.phpt b/tests/Database/Table/GroupedSelection.group.phpt
new file mode 100644
index 000000000..91fc0c964
--- /dev/null
+++ b/tests/Database/Table/GroupedSelection.group.phpt
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Test: Nette\Database\Table: grouping.
+ * @dataProvider? ../databases.ini
+ */
+
+use Tester\Assert;
+
+require __DIR__ . '/../connect.inc.php'; // create $connection
+
+Nette\Database\Helpers::loadFromFile($connection, __DIR__ . "/../files/{$driverName}-nette_test1.sql");
+
+
+test(function() use ($context) {
+	$results = array(
+		1 => array(21, 22),
+		2 => array(23),
+		3 => array(21),
+		4 => array(21, 22)
+	);
+	$books = $context->table('book');
+	foreach($books as $book){
+		$pairs = $book->related('book_tag')->group('tag_id')->order('tag_id')->fetchPairs(NULL, 'tag_id');
+		Assert::same($results[$book->id], array_values($pairs));
+	}
+});