diff --git a/docs/uniCloud/uni-clientDB.md b/docs/uniCloud/uni-clientDB.md
index d5c17983ad49d35bc3eac6cd75e7e9068ae02808..e74d813d966c90cec89c35ddbceee352168f9459 100644
--- a/docs/uniCloud/uni-clientDB.md
+++ b/docs/uniCloud/uni-clientDB.md
@@ -113,7 +113,9 @@ db.action('get-info') // 不使用action时可以不调用action方法
     name: new RegExp('龚','g'),
     time: dbCmd.gt(1105885393581)
   }).field({
-    extra: false
+    name: true,
+    time: true,
+    content: true
   }).get()
   .then((res)=>{