diff --git a/CMakeLists.txt b/CMakeLists.txt
index 86222f8..78d76e0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,9 +2,13 @@ cmake_minimum_required(VERSION 2.8.12)
 
 project(OdbCMake)
 
+option (AT_ONCE "Build all structures into one file." FALSE)
+
+set(TARGET_DB "sqlite")
+
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules")
 
-find_package(ODB REQUIRED COMPONENTS qt sqlite OPTIONAL_COMPONENTS mysql pgsql)
+find_package(ODB REQUIRED COMPONENTS ${TARGET_DB} OPTIONAL_COMPONENTS pgsql)
 include(${ODB_USE_FILE})
 
 set(OdbCMake_SOURCES
@@ -12,13 +16,22 @@ set(OdbCMake_SOURCES
 	database.h)
 
 set(OdbCMake_ODB_HEADERS
-	person.h)
+	person.h
+  employee.h)
 
-odb_compile(OdbCMake_SOURCES FILES ${OdbCMake_ODB_HEADERS} DB sqlite GENERATE_QUERY GENERATE_SESSION)
+if (AT_ONCE)
+	message(STATUS "All database code in one file personal_*")
+	odb_compile(OdbCMake_SOURCES FILES ${OdbCMake_ODB_HEADERS} DB ${TARGET_DB} GENERATE_QUERY GENERATE_SESSION INPUT_NAME "personal")
+else()
+	odb_compile(OdbCMake_SOURCES FILES ${OdbCMake_ODB_HEADERS} DB ${TARGET_DB} GENERATE_QUERY GENERATE_SESSION)
+endif()
 
 add_executable(odbcmake
 	${OdbCMake_SOURCES}
 	${OdbCMake_ODB_HEADERS})
+
+target_compile_definitions(odbcmake PUBLIC AT_ONCE)
+
 target_link_libraries(odbcmake
 	${ODB_LIBRARIES})
 target_include_directories(odbcmake
diff --git a/README b/README
index 6036a71..f2a54d2 100644
--- a/README
+++ b/README
@@ -1,4 +1,12 @@
 CMake Find Module and UseFile for ODB.
 
-See example for information on useage, i'm too lazy to write documentation right now.
+### Windows ODB installation notes:
+Install all odb components into some directory and setup environment variable CMAKE_PREFIX_PATH=your_odb_installation_directory. 
+Directory must contain sub-directories bin for executables(especially odb.exe) and dlls, 
+include/odb for odb headers and lib for lib files. 
+For example c:\odb\bin, c\odb\include and c:\odb\lib. Note: when you copy odb.exe - do not copy only exe file - you need all directories from archive.
+
+### Generate project Windows/Linux
+* One structure per file. Simply run cmake without options.
+* All persistent structures in one file - set option AT_ONCE=ON. For example cmake . -DAT_ONCE=ON
 
diff --git a/cmake/Modules/UseODB.cmake b/cmake/Modules/UseODB.cmake
index 7aeb3b8..e2b6316 100644
--- a/cmake/Modules/UseODB.cmake
+++ b/cmake/Modules/UseODB.cmake
@@ -19,7 +19,8 @@ function(odb_compile outvar)
 		HEADER_PROLOGUE INLINE_PROLOGUE SOURCE_PROLOGUE
 		HEADER_EPILOGUE INLINE_EPILOGUE SOURCE_EPILOGUE
 		MULTI_DATABASE
-		PROFILE)
+		PROFILE
+    INPUT_NAME)
 	set(multiValueParams FILES INCLUDE DB)
 
 	cmake_parse_arguments(PARAM "${options}" "${oneValueParams}" "${multiValueParams}" ${ARGN})
@@ -107,6 +108,11 @@ function(odb_compile outvar)
 		list(APPEND ODB_ARGS --profile "${PARAM_PROFILE}")
 	endif()
 
+  if(PARAM_INPUT_NAME)
+    list(APPEND ODB_ARGS --at-once)
+    list(APPEND ODB_ARGS --input-name "${PARAM_INPUT_NAME}")
+  endif()
+
 	list(APPEND ODB_ARGS --output-dir "${ODB_COMPILE_OUTPUT_DIR}")
 	list(APPEND ODB_ARGS --hxx-suffix "${ODB_COMPILE_HEADER_SUFFIX}")
 	list(APPEND ODB_ARGS --ixx-suffix "${ODB_COMPILE_INLINE_SUFFIX}")
@@ -135,9 +141,9 @@ function(odb_compile outvar)
 	file(REMOVE_RECURSE "${ODB_COMPILE_OUTPUT_DIR}")
 	file(MAKE_DIRECTORY "${ODB_COMPILE_OUTPUT_DIR}")
 
-	foreach(input ${PARAM_FILES})
-		get_filename_component(fname "${input}" NAME_WE)
-		set(outputs)
+	if(PARAM_INPUT_NAME)
+		get_filename_component(fname "${PARAM_INPUT_NAME}" NAME_WE)
+			set(outputs)
 
 		foreach(sfx ${ODB_COMPILE_FILE_SUFFIX})
 			string(REGEX REPLACE ":.*$" "" pfx "${sfx}")
@@ -149,6 +155,27 @@ function(odb_compile outvar)
 				list(APPEND outputs "${output}")
 			endif()
 		endforeach()
+		
+		add_custom_command(OUTPUT ${outputs}
+			COMMAND ${ODB_EXECUTABLE} ${ODB_ARGS} ${PARAM_FILES}
+			DEPENDS ${PARAM_FILES}
+			WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+			VERBATIM)
+	else()
+		foreach(input ${PARAM_FILES})
+			get_filename_component(fname "${input}" NAME_WE)
+			set(outputs)
+
+			foreach(sfx ${ODB_COMPILE_FILE_SUFFIX})
+				string(REGEX REPLACE ":.*$" "" pfx "${sfx}")
+				string(REGEX REPLACE "^.*:" "" sfx "${sfx}")
+
+				if(NOT "${PARAM_MULTI_DATABASE}" MATCHES "static" OR NOT "${pfx}" MATCHES "common")
+					set(output "${ODB_COMPILE_OUTPUT_DIR}/${fname}${sfx}${ODB_COMPILE_SOURCE_SUFFIX}")
+					list(APPEND ${outvar} "${output}")
+					list(APPEND outputs "${output}")
+				endif()
+			endforeach()
 
 		if(ODB_COMPILE_DEBUG)
 			set(_msg "${ODB_EXECUTABLE} ${ODB_ARGS} ${input}")
@@ -161,7 +188,8 @@ function(odb_compile outvar)
 			DEPENDS "${input}"
 			WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
 			VERBATIM)
-	endforeach()
+		endforeach()
+	endif()
 
 	set(${outvar} ${${outvar}} PARENT_SCOPE)
 endfunction()
diff --git a/driver.cpp b/driver.cpp
index 59a07df..f704499 100644
--- a/driver.cpp
+++ b/driver.cpp
@@ -10,8 +10,14 @@
 #include "database.h" // create_database
 
 #include "person.h"
-#include "person_odb.h"
+#include "employee.h"
 
+#ifdef AT_ONCE
+	#include "personal_odb.h"
+#else
+#include "person_odb.h"
+#include "employee_odb.h"
+#endif
 using namespace std;
 using namespace odb::core;
 
diff --git a/employee.h b/employee.h
new file mode 100644
index 0000000..bb53937
--- /dev/null
+++ b/employee.h
@@ -0,0 +1,32 @@
+// file      : hello/employee.hxx
+// copyright : not copyrighted - public domain
+
+#ifndef EMPLOYEE_HXX
+#define EMPLOYEE_HXX
+
+
+#include <string>
+#include <cstddef> // std::size_t
+
+#include <odb/core.hxx>
+
+#pragma db object
+class employee
+{
+public:
+  std::string position() const { return position_; }
+  unsigned short experience() const { return experience_; }  
+
+private:
+  friend class odb::access;
+
+  employee () {}
+
+  #pragma db id auto
+  unsigned long id_;
+
+  std::string position_;
+  unsigned short experience_;
+};
+
+#endif // EMPLOYEE_HXX