diff --git a/include/sqlpp11/chrono.h b/include/sqlpp11/chrono.h
index 1ab77523..ab91d746 100644
--- a/include/sqlpp11/chrono.h
+++ b/include/sqlpp11/chrono.h
@@ -44,6 +44,14 @@ namespace sqlpp
 #else
     using ::date::floor;
 #endif
+
+
+    template<typename T>
+    std::chrono::microseconds time_of_day(T t)
+    {
+      const auto dp = floor<days>(t);
+      return std::chrono::duration_cast<std::chrono::microseconds>(::date::make_time(t - dp).to_duration());
+    }
   }
 }
 
diff --git a/include/sqlpp11/data_types.h b/include/sqlpp11/data_types.h
index 0c54cc61..eee711bc 100644
--- a/include/sqlpp11/data_types.h
+++ b/include/sqlpp11/data_types.h
@@ -29,6 +29,7 @@
 
 #include <sqlpp11/data_types/boolean.h>
 #include <sqlpp11/data_types/integral.h>
+#include <sqlpp11/data_types/unsigned_integral.h>
 #include <sqlpp11/data_types/floating_point.h>
 #include <sqlpp11/data_types/text.h>
 #include <sqlpp11/data_types/day_point.h>
diff --git a/include/sqlpp11/data_types/integral/wrap_operand.h b/include/sqlpp11/data_types/integral/wrap_operand.h
index a395b864..1a07838a 100644
--- a/include/sqlpp11/data_types/integral/wrap_operand.h
+++ b/include/sqlpp11/data_types/integral/wrap_operand.h
@@ -35,7 +35,7 @@ namespace sqlpp
   struct integral_operand;
 
   template <typename T>
-  struct wrap_operand<T, typename std::enable_if<std::is_integral<T>::value and not std::is_same<bool, T>::value>::type>
+  struct wrap_operand<T, typename std::enable_if<std::is_integral<T>::value and not std::is_same<bool, T>::value and not std::is_unsigned<T>::value>::type>
   {
     using type = integral_operand;
   };
diff --git a/include/sqlpp11/data_types/unsigned_integral.h b/include/sqlpp11/data_types/unsigned_integral.h
new file mode 100644
index 00000000..ba0a98ff
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_H
+#define SQLPP_UNSIGNED_INTEGRAL_H
+
+#include <sqlpp11/data_types/unsigned_integral/data_type.h>
+#include <sqlpp11/data_types/unsigned_integral/operand.h>
+#include <sqlpp11/data_types/unsigned_integral/wrap_operand.h>
+#include <sqlpp11/data_types/unsigned_integral/expression_operators.h>
+#include <sqlpp11/data_types/unsigned_integral/column_operators.h>
+#include <sqlpp11/data_types/unsigned_integral/parameter_value.h>
+#include <sqlpp11/data_types/unsigned_integral/result_field.h>
+
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/column_operators.h b/include/sqlpp11/data_types/unsigned_integral/column_operators.h
new file mode 100644
index 00000000..ea98038b
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/column_operators.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_COLUMN_OPERATORS_H
+#define SQLPP_UNSIGNED_INTEGRAL_COLUMN_OPERATORS_H
+
+#include <sqlpp11/type_traits.h>
+#include <sqlpp11/assignment.h>
+#include <sqlpp11/value_type.h>
+#include <sqlpp11/data_types/unsigned_integral/data_type.h>
+#include <sqlpp11/data_types/column_operators.h>
+
+namespace sqlpp
+{
+  template <typename Column>
+  struct column_operators<Column, unsigned_integral>
+  {
+    template <typename T>
+    using _is_valid_operand = is_valid_operand<unsigned_integral, T>;
+
+    template <typename T>
+    auto operator+=(T t) const -> assignment_t<Column, plus_t<Column, value_type_t<T>, wrap_operand_t<T>>>
+    {
+      using rhs = wrap_operand_t<T>;
+      static_assert(_is_valid_operand<rhs>::value, "invalid rhs assignment operand");
+
+      return {*static_cast<const Column*>(this), {{*static_cast<const Column*>(this), rhs{t}}}};
+    }
+
+    template <typename T>
+    auto operator-=(T t) const -> assignment_t<Column, minus_t<Column, value_type_t<T>, wrap_operand_t<T>>>
+    {
+      using rhs = wrap_operand_t<T>;
+      static_assert(_is_valid_operand<rhs>::value, "invalid rhs assignment operand");
+
+      return {*static_cast<const Column*>(this), {{*static_cast<const Column*>(this), rhs{t}}}};
+    }
+
+    template <typename T>
+    auto operator/=(T t) const -> assignment_t<Column, divides_t<Column, wrap_operand_t<T>>>
+    {
+      using rhs = wrap_operand_t<T>;
+      static_assert(_is_valid_operand<rhs>::value, "invalid rhs assignment operand");
+
+      return {*static_cast<const Column*>(this), {{*static_cast<const Column*>(this), rhs{t}}}};
+    }
+
+    template <typename T>
+    auto operator*=(T t) const -> assignment_t<Column, multiplies_t<Column, value_type_t<T>, wrap_operand_t<T>>>
+    {
+      using rhs = wrap_operand_t<T>;
+      static_assert(_is_valid_operand<rhs>::value, "invalid rhs assignment operand");
+
+      return {*static_cast<const Column*>(this), {{*static_cast<const Column*>(this), rhs{t}}}};
+    }
+  };
+}
+
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/data_type.h b/include/sqlpp11/data_types/unsigned_integral/data_type.h
new file mode 100644
index 00000000..68e061aa
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/data_type.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_DATA_TYPE_H
+#define SQLPP_UNSIGNED_INTEGRAL_DATA_TYPE_H
+
+#include <sqlpp11/type_traits.h>
+
+namespace sqlpp
+{
+  struct unsigned_integral
+  {
+    using _traits = make_traits<unsigned_integral, tag::is_value_type>;
+    using _cpp_value_type = uint64_t;
+
+    template <typename T>
+    using _is_valid_operand = is_numeric_t<T>;
+  };
+
+  using tinyint_unsigned = unsigned_integral;
+  using smallint_unsigned = unsigned_integral;
+  using integer_unsigned = unsigned_integral;
+  using bigint_unsigned = unsigned_integral;
+}
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/expression_operators.h b/include/sqlpp11/data_types/unsigned_integral/expression_operators.h
new file mode 100644
index 00000000..0ce3b0e1
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/expression_operators.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_EXPRESSION_OPERATORS_H
+#define SQLPP_UNSIGNED_INTEGRAL_EXPRESSION_OPERATORS_H
+
+#include <sqlpp11/expression_return_types.h>
+#include <sqlpp11/operand_check.h>
+#include <sqlpp11/expression_operators.h>
+#include <sqlpp11/basic_expression_operators.h>
+#include <sqlpp11/value_type.h>
+#include <sqlpp11/type_traits.h>
+#include <sqlpp11/data_types/unsigned_integral/data_type.h>
+
+namespace sqlpp
+{
+  template <typename Expression>
+  struct expression_operators<Expression, unsigned_integral> : public basic_expression_operators<Expression>
+  {
+  };
+
+  template <typename L, typename R>
+  struct return_type_plus<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_numeric_t>>
+  {
+    using check = consistent_t;
+    using type = plus_t<wrap_operand_t<L>, value_type_of<wrap_operand_t<R>>, wrap_operand_t<R>>;
+  };
+
+  template <typename L, typename R>
+  struct return_type_minus<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_numeric_t>>
+  {
+    using check = consistent_t;
+    using type = minus_t<wrap_operand_t<L>, value_type_of<wrap_operand_t<R>>, wrap_operand_t<R>>;
+  };
+
+  template <typename L, typename R>
+  struct return_type_multiplies<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_numeric_t>>
+  {
+    using check = consistent_t;
+    using type = multiplies_t<wrap_operand_t<L>, value_type_of<wrap_operand_t<R>>, wrap_operand_t<R>>;
+  };
+
+  template <typename L, typename R>
+  struct return_type_divides<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_numeric_t>>
+  {
+    using check = consistent_t;
+    using type = divides_t<wrap_operand_t<L>, wrap_operand_t<R>>;
+  };
+
+  template <typename L, typename R>
+  struct return_type_modulus<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_unsigned_integral_t>>
+  {
+    using check = consistent_t;
+    using type = modulus_t<wrap_operand_t<L>, wrap_operand_t<R>>;
+  };
+
+  template <typename T, typename Defer>
+  struct return_type_unary_plus<T, Defer, unary_operand_check_t<T, is_unsigned_integral_t>>
+  {
+    using check = consistent_t;
+    using type = unary_plus_t<unsigned_integral, wrap_operand_t<T>>;
+  };
+
+  template <typename T, typename Defer>
+  struct return_type_unary_minus<T, Defer, unary_operand_check_t<T, is_unsigned_integral_t>>
+  {
+    using check = consistent_t;
+    using type = unary_minus_t<unsigned_integral, wrap_operand_t<T>>;
+  };
+
+  template <typename L, typename R>
+  struct return_type_bitwise_and<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_unsigned_integral_t>>
+  {
+    using check = consistent_t;
+    using type = bitwise_and_t<wrap_operand_t<L>, unsigned_integral, wrap_operand_t<R>>;
+  };
+
+  template <typename L, typename R>
+  struct return_type_bitwise_or<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_unsigned_integral_t>>
+  {
+    using check = consistent_t;
+    using type = bitwise_or_t<wrap_operand_t<L>, unsigned_integral, wrap_operand_t<R>>;
+  };
+}
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/operand.h b/include/sqlpp11/data_types/unsigned_integral/operand.h
new file mode 100644
index 00000000..d117b6fa
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/operand.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_OPERAND_H
+#define SQLPP_UNSIGNED_INTEGRAL_OPERAND_H
+
+#include <sqlpp11/type_traits.h>
+#include <sqlpp11/alias_operators.h>
+#include <sqlpp11/serializer.h>
+
+namespace sqlpp
+{
+  struct unsigned_integral;
+
+  struct unsigned_integral_operand : public alias_operators<unsigned_integral_operand>
+  {
+    using _traits = make_traits<unsigned_integral, tag::is_expression, tag::is_wrapped_value>;
+    using _nodes = detail::type_vector<>;
+    using _is_aggregate_expression = std::true_type;
+
+    using _value_t = uint64_t;
+
+    unsigned_integral_operand() : _t{}
+    {
+    }
+
+    unsigned_integral_operand(_value_t t) : _t(t)
+    {
+    }
+
+    unsigned_integral_operand(const unsigned_integral_operand&) = default;
+    unsigned_integral_operand(unsigned_integral_operand&&) = default;
+    unsigned_integral_operand& operator=(const unsigned_integral_operand&) = default;
+    unsigned_integral_operand& operator=(unsigned_integral_operand&&) = default;
+    ~unsigned_integral_operand() = default;
+
+    bool _is_trivial() const
+    {
+      return _t == 0;
+    }
+
+    _value_t _t;
+  };
+
+  template <typename Context>
+  struct serializer_t<Context, unsigned_integral_operand>
+  {
+    using _serialize_check = consistent_t;
+    using Operand = unsigned_integral_operand;
+
+    static Context& _(const Operand& t, Context& context)
+    {
+      context << t._t;
+      return context;
+    }
+  };
+}
+
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/parameter_value.h b/include/sqlpp11/data_types/unsigned_integral/parameter_value.h
new file mode 100644
index 00000000..9b596d33
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/parameter_value.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_PARAMETER_VALUE_H
+#define SQLPP_UNSIGNED_INTEGRAL_PARAMETER_VALUE_H
+
+#include <sqlpp11/data_types/parameter_value.h>
+#include <sqlpp11/data_types/parameter_value_base.h>
+#include <sqlpp11/data_types/unsigned_integral/data_type.h>
+#include <sqlpp11/tvin.h>
+
+namespace sqlpp
+{
+  template <>
+  struct parameter_value_t<unsigned_integral> : public parameter_value_base<unsigned_integral>
+  {
+    using base = parameter_value_base<unsigned_integral>;
+    using base::base;
+    using base::operator=;
+
+    template <typename Target>
+    void _bind(Target& target, size_t index) const
+    {
+      target._bind_unsigned_integral_parameter(index, &_value, _is_null);
+    }
+  };
+}
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/result_field.h b/include/sqlpp11/data_types/unsigned_integral/result_field.h
new file mode 100644
index 00000000..960ccc1a
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/result_field.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_RESULT_FIELD_H
+#define SQLPP_UNSIGNED_INTEGRAL_RESULT_FIELD_H
+
+#include <sqlpp11/basic_expression_operators.h>
+#include <sqlpp11/result_field.h>
+#include <sqlpp11/result_field_base.h>
+#include <sqlpp11/data_types/unsigned_integral/data_type.h>
+#include <sqlpp11/field_spec.h>
+
+namespace sqlpp
+{
+  template <typename Db, typename NameType, bool CanBeNull, bool NullIsTrivialValue>
+  struct result_field_t<Db, field_spec_t<NameType, unsigned_integral, CanBeNull, NullIsTrivialValue>>
+      : public result_field_base<Db, field_spec_t<NameType, unsigned_integral, CanBeNull, NullIsTrivialValue>>
+  {
+    template <typename Target>
+    void _bind(Target& target, size_t index)
+    {
+      target._bind_unsigned_integral_result(index, &this->_value, &this->_is_null);
+    }
+
+    template <typename Target>
+    void _post_bind(Target& target, size_t index)
+    {
+      target._post_bind_unsigned_integral_result(index, &this->_value, &this->_is_null);
+    }
+  };
+}
+#endif
diff --git a/include/sqlpp11/data_types/unsigned_integral/wrap_operand.h b/include/sqlpp11/data_types/unsigned_integral/wrap_operand.h
new file mode 100644
index 00000000..d12a5af6
--- /dev/null
+++ b/include/sqlpp11/data_types/unsigned_integral/wrap_operand.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2013-2015, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_UNSIGNED_INTEGRAL_WRAP_OPERAND_H
+#define SQLPP_UNSIGNED_INTEGRAL_WRAP_OPERAND_H
+
+#include <utility>
+#include <sqlpp11/wrap_operand.h>
+
+namespace sqlpp
+{
+  struct unsigned_integral_operand;
+
+  template <typename T>
+  struct wrap_operand<T, typename std::enable_if<std::is_integral<T>::value and not std::is_same<bool, T>::value and std::is_unsigned<T>::value>::type>
+  {
+    using type = unsigned_integral_operand;
+  };
+}
+#endif
diff --git a/include/sqlpp11/type_traits.h b/include/sqlpp11/type_traits.h
index 1b2d33ea..08a3f9fe 100644
--- a/include/sqlpp11/type_traits.h
+++ b/include/sqlpp11/type_traits.h
@@ -79,6 +79,10 @@ namespace sqlpp
   template <typename T>
   using is_integral_t = std::is_same<value_type_of<T>, integral>;
 
+  struct unsigned_integral;
+  template <typename T>
+  using is_unsigned_integral_t = std::is_same<value_type_of<T>, unsigned_integral>;
+
   struct text;
   template <typename T>
   using is_text_t = std::is_same<value_type_of<T>, text>;
@@ -89,7 +93,7 @@ namespace sqlpp
 
   // joined data type
   template <typename T>
-  using is_numeric_t = logic::any_t<is_integral_t<T>::value, is_floating_point_t<T>::value>;
+  using is_numeric_t = logic::any_t<is_integral_t<T>::value, is_unsigned_integral_t<T>::value, is_floating_point_t<T>::value>;
 
   template <typename T>
   using is_day_or_time_point_t = logic::any_t<is_day_point_t<T>::value, is_time_point_t<T>::value>;
diff --git a/tests/Sample.h b/tests/Sample.h
index 0bb6dc51..bd9b30ea 100644
--- a/tests/Sample.h
+++ b/tests/Sample.h
@@ -75,9 +75,31 @@ namespace test
       };
       using _traits = sqlpp::make_traits<sqlpp::floating_point, sqlpp::tag::can_be_null>;
     };
+    struct Psi
+    {
+      struct _alias_t
+      {
+        static constexpr const char _literal[] = "psi";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
+        template <typename T>
+        struct _member_t
+        {
+          T psi;
+          T& operator()()
+          {
+            return psi;
+          }
+          const T& operator()() const
+          {
+            return psi;
+          }
+        };
+      };
+      using _traits = sqlpp::make_traits<sqlpp::bigint_unsigned, sqlpp::tag::can_be_null>;
+   };
   }
 
-  struct TabFoo : sqlpp::table_t<TabFoo, TabFoo_::Delta, TabFoo_::Epsilon, TabFoo_::Omega>
+  struct TabFoo : sqlpp::table_t<TabFoo, TabFoo_::Delta, TabFoo_::Epsilon, TabFoo_::Omega, TabFoo_::Psi>
   {
     struct _alias_t
     {
diff --git a/tests/SelectType.cpp b/tests/SelectType.cpp
index 712491e0..ce5bd2d8 100644
--- a/tests/SelectType.cpp
+++ b/tests/SelectType.cpp
@@ -108,6 +108,7 @@ int SelectType(int, char* [])
     using T = decltype(t.alpha);
     static_assert(sqlpp::is_numeric_t<T>::value, "type requirement");
     static_assert(sqlpp::is_integral_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_unsigned_integral_t<T>::value, "type requirement");
     static_assert(not sqlpp::is_floating_point_t<T>::value, "type requirement");
     static_assert(sqlpp::is_expression_t<T>::value, "type requirement");
     static_assert(sqlpp::is_selectable_t<T>::value, "type requirement");
@@ -121,6 +122,23 @@ int SelectType(int, char* [])
     static_assert(sqlpp::is_regular<T>::value, "type requirement");
   }
 
+  // Test an unsigned integral table column
+  {
+    using T = decltype(f.psi);
+    static_assert(sqlpp::is_numeric_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_integral_t<T>::value, "type requirement");
+    static_assert(sqlpp::is_unsigned_integral_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_floating_point_t<T>::value, "type requirement");
+    static_assert(sqlpp::is_expression_t<T>::value, "type requirement");
+    static_assert(sqlpp::is_selectable_t<T>::value, "type requirement");
+    static_assert(not sqlpp::require_insert_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_boolean_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_text_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_alias_t<T>::value, "type requirement");
+    static_assert(not sqlpp::is_table_t<T>::value, "type requirement");
+    static_assert(sqlpp::is_regular<T>::value, "type requirement");
+  }
+
   // Test a floating point table column
   {
     using T = decltype(f.omega);
diff --git a/tests/sample.sql b/tests/sample.sql
index fc420fd0..5ebabf00 100644
--- a/tests/sample.sql
+++ b/tests/sample.sql
@@ -28,7 +28,8 @@ CREATE TABLE tab_foo
 (
 	delta varchar(255),
 	epsilon bigint,
-	omega double
+	omega double,
+	psi bigint UNSIGNED
 );
 
 CREATE TABLE tab_bar