diff --git a/doc/db/3pigxx_ac.sql b/doc/db/3pigxx_ac.sql
index d688130da..7c708afda 100644
--- a/doc/db/3pigxx_ac.sql
+++ b/doc/db/3pigxx_ac.sql
@@ -13,6 +13,7 @@
 
  Date: 12/11/2018 21:39:50 PM
 */
+USE pigxx_ac;
 
 SET NAMES utf8;
 SET FOREIGN_KEY_CHECKS = 0;