diff --git a/README.md b/README.md
index d1fe60e..465908a 100644
--- a/README.md
+++ b/README.md
@@ -13,9 +13,11 @@ import (
 )
 
 type Entity struct {
-    Id        int       `db:"id"`
-    Name      string    `db:"name"`
-    CreatedAt time.Time `db:"created_at"`
+    Id            int       `db:"id"`
+    Name          string    `db:"name"`
+    DateTimeField time.Time `db:"created_at"`
+    FieldNotIdDb  int
+    NullableField *int
 }
 
 var structColumns = dbmap.Columns(reflect.TypeOf(Entity{}))
@@ -30,4 +32,4 @@ func main(){
     // ...
 }
 
-```
\ No newline at end of file
+```