diff --git a/include/sqlpp11/core/aggregate_function/avg.h b/include/sqlpp11/core/aggregate_function/avg.h
index 4a993724..4d860a88 100644
--- a/include/sqlpp11/core/aggregate_function/avg.h
+++ b/include/sqlpp11/core/aggregate_function/avg.h
@@ -37,7 +37,7 @@ namespace sqlpp
 {
   namespace alias
   {
-    SQLPP_ALIAS_PROVIDER(avg);
+    SQLPP_ALIAS_PROVIDER(_avg);
   }
 
   template <typename Flag, typename Expr>
@@ -68,7 +68,7 @@ namespace sqlpp
   };
 
   template <typename Flag, typename Expr>
-  struct name_tag_of<avg_t<Flag, Expr>>: public name_tag_of<alias::avg_t>
+  struct name_tag_of<avg_t<Flag, Expr>>: public name_tag_of<alias::_avg_t>
   {
   };
 
diff --git a/include/sqlpp11/core/aggregate_function/count.h b/include/sqlpp11/core/aggregate_function/count.h
index 7577fc5b..df79eac5 100644
--- a/include/sqlpp11/core/aggregate_function/count.h
+++ b/include/sqlpp11/core/aggregate_function/count.h
@@ -37,7 +37,7 @@ namespace sqlpp
 {
   namespace alias
   {
-    SQLPP_ALIAS_PROVIDER(count);
+    SQLPP_ALIAS_PROVIDER(_count);
   }
 
   template <typename Flag, typename Expr>
@@ -68,7 +68,7 @@ namespace sqlpp
   };
 
   template <typename Flag, typename Expr>
-  struct name_tag_of<count_t<Flag, Expr>>: public name_tag_of<alias::count_t>
+  struct name_tag_of<count_t<Flag, Expr>>: public name_tag_of<alias::_count_t>
   {
   };
 
diff --git a/include/sqlpp11/core/aggregate_function/max.h b/include/sqlpp11/core/aggregate_function/max.h
index d4f53286..5c4e6756 100644
--- a/include/sqlpp11/core/aggregate_function/max.h
+++ b/include/sqlpp11/core/aggregate_function/max.h
@@ -37,7 +37,7 @@ namespace sqlpp
 {
   namespace alias
   {
-    SQLPP_ALIAS_PROVIDER(max);
+    SQLPP_ALIAS_PROVIDER(_max);
   }
 
   template <typename Flag, typename Expr>
@@ -67,7 +67,7 @@ namespace sqlpp
   };
 
   template <typename Flag, typename Expr>
-  struct name_tag_of<max_t<Flag, Expr>>: public name_tag_of<alias::max_t>
+  struct name_tag_of<max_t<Flag, Expr>>: public name_tag_of<alias::_max_t>
   {
   };
 
diff --git a/include/sqlpp11/core/aggregate_function/min.h b/include/sqlpp11/core/aggregate_function/min.h
index eb06ca56..2c3e3596 100644
--- a/include/sqlpp11/core/aggregate_function/min.h
+++ b/include/sqlpp11/core/aggregate_function/min.h
@@ -37,7 +37,7 @@ namespace sqlpp
 {
   namespace alias
   {
-    SQLPP_ALIAS_PROVIDER(min);
+    SQLPP_ALIAS_PROVIDER(_min);
   }
 
   template <typename Flag, typename Expr>
@@ -67,7 +67,7 @@ namespace sqlpp
   };
 
   template <typename Flag, typename Expr>
-  struct name_tag_of<min_t<Flag, Expr>>: public name_tag_of<alias::min_t>
+  struct name_tag_of<min_t<Flag, Expr>>: public name_tag_of<alias::_min_t>
   {
   };
 
diff --git a/include/sqlpp11/core/aggregate_function/sum.h b/include/sqlpp11/core/aggregate_function/sum.h
index 45c1daf7..38020268 100644
--- a/include/sqlpp11/core/aggregate_function/sum.h
+++ b/include/sqlpp11/core/aggregate_function/sum.h
@@ -37,7 +37,7 @@ namespace sqlpp
 {
   namespace alias
   {
-    SQLPP_ALIAS_PROVIDER(sum);
+    SQLPP_ALIAS_PROVIDER(_sum);
   }
 
   template <typename Flag, typename Expr>
@@ -67,7 +67,7 @@ namespace sqlpp
   };
 
   template <typename Flag, typename Expr>
-  struct name_tag_of<sum_t<Flag, Expr>>: public name_tag_of<alias::sum_t>
+  struct name_tag_of<sum_t<Flag, Expr>>: public name_tag_of<alias::_sum_t>
   {
   };
 
diff --git a/include/sqlpp11/core/clause/select_column_list.h b/include/sqlpp11/core/clause/select_column_list.h
index 6f10a0ad..ee7372db 100644
--- a/include/sqlpp11/core/clause/select_column_list.h
+++ b/include/sqlpp11/core/clause/select_column_list.h
@@ -223,7 +223,7 @@ namespace sqlpp
   };
 
   template <typename Column>
-  struct name_tag_of<select_column_list_t<Column>> : public name_tag_of<Column>
+  struct name_tag_of<select_column_list_t<Column>> : public select_column_name_tag_of<Column>
   {
   };
 
diff --git a/tests/core/types/clause/select_columns.cpp b/tests/core/types/clause/select_columns.cpp
index d7b744ab..16b55cd0 100644
--- a/tests/core/types/clause/select_columns.cpp
+++ b/tests/core/types/clause/select_columns.cpp
@@ -29,18 +29,51 @@
 namespace
 {
   SQLPP_ALIAS_PROVIDER(cheese);
+
+  template <typename T>
+  struct clause_of;
+
+  template <typename T>
+  struct clause_of<sqlpp::statement_t<T>>
+  {
+    using type = T;
+  };
+  template <typename T>
+  using clause_of_t = typename clause_of<T>::type;
 }
 
 void test_select_columns()
 {
-  auto v = sqlpp::value(17);
+  auto v = sqlpp::value("text");
   auto col_int = test::TabFoo{}.id;
-  auto col_txt = test::TabFoo{}.textNnD;
 
-  select_columns(col_int);
-  select_columns(dynamic(true, col_int));
-  select_columns(as(declare_group_by_column(v), cheese));
-  select_columns(dynamic(true, declare_group_by_column(v)).as(cheese));
+  // Single column
+  {
+    using T = clause_of_t<decltype(select_columns(col_int))>;
+    static_assert(std::is_same<sqlpp::name_tag_of_t<T>, test::TabFoo_::Id::_sqlpp_name_tag>::value, "");
+    static_assert(std::is_same<sqlpp::value_type_of_t<T>, sqlpp::integral>::value, "");
+  }
+
+  // Single dynamic column
+  {
+    using T = clause_of_t<decltype(select_columns(dynamic(true, col_int)))>;
+    static_assert(std::is_same<sqlpp::name_tag_of_t<T>, test::TabFoo_::Id::_sqlpp_name_tag>::value, "");
+    static_assert(std::is_same<sqlpp::value_type_of_t<T>, sqlpp::optional<sqlpp::integral>>::value, "");
+  }
+
+  // Single declared group by column
+  {
+    using T = clause_of_t<decltype(select_columns(declare_group_by_column(v).as(cheese)))>;
+    static_assert(std::is_same<sqlpp::name_tag_of_t<T>, cheese_t::_sqlpp_name_tag>::value, "");
+    static_assert(std::is_same<sqlpp::value_type_of_t<T>, sqlpp::text>::value, "");
+  }
+
+  // Single dynamic declared group by column
+  {
+    using T = clause_of_t<decltype(select_columns(dynamic(true, declare_group_by_column(v)).as(cheese)))>;
+    static_assert(std::is_same<sqlpp::name_tag_of_t<T>, cheese_t::_sqlpp_name_tag>::value, "");
+    static_assert(std::is_same<sqlpp::value_type_of_t<T>, sqlpp::optional<sqlpp::text>>::value, "");
+  }
 
 #warning: add actual tests here
 
diff --git a/tests/core/types/result_row.cpp b/tests/core/types/result_row.cpp
index 41cc8d6b..c49fcac8 100644
--- a/tests/core/types/result_row.cpp
+++ b/tests/core/types/result_row.cpp
@@ -56,7 +56,7 @@ void test_result_row(Value v)
   auto v_not_null = sqlpp::value(v).as(r_not_null);
   const auto v_maybe_null = sqlpp::value(::sqlpp::make_optional(v)).as(r_maybe_null);
 
-  // Optional selectable values.
+  // Dynamically selectable values.
   const auto v_opt_not_null = dynamic(true, sqlpp::value(v)).as(r_opt_not_null);
   const auto v_opt_maybe_null = dynamic(true, sqlpp::value(::sqlpp::make_optional(v))).as(r_opt_maybe_null);