diff --git a/src/Database/Adapter.php b/src/Database/Adapter.php
index d3584a437..88fd7d64f 100644
--- a/src/Database/Adapter.php
+++ b/src/Database/Adapter.php
@@ -1070,7 +1070,7 @@ abstract public function getKeywords(): array;
      * @param string $prefix
      * @return mixed
      */
-    abstract protected function getAttributeProjection(array $selections, string $prefix = ''): mixed;
+    abstract protected function getAttributeProjection(array $selections, string $prefix): mixed;
 
     /**
      * Get all selected attributes from queries
diff --git a/src/Database/Adapter/Pool.php b/src/Database/Adapter/Pool.php
index b6bc54b08..302338aa9 100644
--- a/src/Database/Adapter/Pool.php
+++ b/src/Database/Adapter/Pool.php
@@ -455,7 +455,7 @@ public function getKeywords(): array
         return $this->delegate(__FUNCTION__, \func_get_args());
     }
 
-    protected function getAttributeProjection(array $selections, string $prefix = ''): mixed
+    protected function getAttributeProjection(array $selections, string $prefix): mixed
     {
         return $this->delegate(__FUNCTION__, \func_get_args());
     }
diff --git a/src/Database/Adapter/SQL.php b/src/Database/Adapter/SQL.php
index 4c335bfba..31bc7e6a3 100644
--- a/src/Database/Adapter/SQL.php
+++ b/src/Database/Adapter/SQL.php
@@ -337,11 +337,13 @@ public function getDocument(string $collection, string $id, array $queries = [],
 
         $forUpdate = $forUpdate ? 'FOR UPDATE' : '';
 
+        $alias = Query::DEFAULT_ALIAS;
+
         $sql = "
-		    SELECT {$this->getAttributeProjection($selections)}
-            FROM {$this->getSQLTable($name)}
-            WHERE _uid = :_uid 
-            {$this->getTenantQuery($collection)}
+		    SELECT {$this->getAttributeProjection($selections, $alias)}
+            FROM {$this->getSQLTable($name)} AS {$this->quote($alias)}
+            WHERE {$this->quote($alias)}.{$this->quote('_uid')} = :_uid 
+            {$this->getTenantQuery($collection, $alias)}
 		";
 
         if ($this->getSupportForUpdateLock()) {
@@ -1680,13 +1682,10 @@ public function getTenantQuery(
      * @return mixed
      * @throws Exception
      */
-    protected function getAttributeProjection(array $selections, string $prefix = ''): mixed
+    protected function getAttributeProjection(array $selections, string $prefix): mixed
     {
         if (empty($selections) || \in_array('*', $selections)) {
-            if (!empty($prefix)) {
-                return "{$this->quote($prefix)}.*";
-            }
-            return '*';
+            return "{$this->quote($prefix)}.*";
         }
 
         $internalKeys = [
@@ -1703,14 +1702,8 @@ protected function getAttributeProjection(array $selections, string $prefix = ''
             $selections[] = $this->getInternalKeyForAttribute($internalKey);
         }
 
-        if (!empty($prefix)) {
-            foreach ($selections as &$selection) {
-                $selection = "{$this->quote($prefix)}.{$this->quote($this->filter($selection))}";
-            }
-        } else {
-            foreach ($selections as &$selection) {
-                $selection = "{$this->quote($this->filter($selection))}";
-            }
+        foreach ($selections as &$selection) {
+            $selection = "{$this->quote($prefix)}.{$this->quote($this->filter($selection))}";
         }
 
         return \implode(',', $selections);