diff --git a/src/Database/SqlPreprocessor.php b/src/Database/SqlPreprocessor.php
index ad3ef7f43..40345e8ec 100644
--- a/src/Database/SqlPreprocessor.php
+++ b/src/Database/SqlPreprocessor.php
@@ -20,7 +20,7 @@ class SqlPreprocessor
 	use Nette\SmartObject;
 
 	/** @var array */
-	private const MODE_LIST = ['and', 'or', 'set', 'values', 'order'];
+	private const MODE_LIST = ['and', 'or', 'set', 'values', 'order', 'as'];
 
 	private const ARRAY_MODES = [
 		'INSERT' => 'values',
@@ -253,6 +253,12 @@ private function formatValue($value, string $mode = null): string
 				}
 				return implode(', ', $vx);
 
+			} elseif ($mode === 'as') {
+				foreach ($value as $k => $v) {
+					$vx[] = $this->delimite($k) . ' AS ' . $v;
+				}
+				return implode(', ', $vx);
+
 			} else {
 				throw new Nette\InvalidArgumentException("Unknown placeholder ?$mode.");
 			}