Fix documentation basic example (missing imports)

diff --git a/doc/build/orm/extensions/declarative/basic_use.rst b/doc/build/orm/extensions/declarative/basic_use.rst
index 10b79e5a6fbcd041ef171704c58bf5d25ccb5a65..bc9f913f2e59320adbce2b55731ed1ca7d7a57bc 100644 (file)
--- a/doc/build/orm/extensions/declarative/basic_use.rst
+++ b/doc/build/orm/extensions/declarative/basic_use.rst
@@ -13,6 +13,7 @@ usage and declarative remain highly similar.
 
 As a simple example::
 
+    from sqlalchemy import Column, Integer, String
     from sqlalchemy.ext.declarative import declarative_base
 
     Base = declarative_base()