diff --git a/doc/db/2pigxx.sql b/doc/db/2pigxx.sql
index 1540b81c5..a40c8cf4a 100644
--- a/doc/db/2pigxx.sql
+++ b/doc/db/2pigxx.sql
@@ -13,6 +13,7 @@
 
  Date: 12/10/2018 21:57:20 PM
 */
+USE pigxx;
 
 SET NAMES utf8;
 SET FOREIGN_KEY_CHECKS = 0;
diff --git a/doc/db/3pigxx_ac.sql b/doc/db/3pigxx_ac.sql
index cac339671..1f2e5d1c8 100644
--- a/doc/db/3pigxx_ac.sql
+++ b/doc/db/3pigxx_ac.sql
@@ -13,6 +13,7 @@
 
  Date: 12/10/2018 21:57:09 PM
 */
+USE pigxx_ac;
 
 SET NAMES utf8;
 SET FOREIGN_KEY_CHECKS = 0;