diff --git a/app/models/concerns/statisticable.rb b/app/models/concerns/statisticable.rb
index c3ee15139..826d7dc68 100644
--- a/app/models/concerns/statisticable.rb
+++ b/app/models/concerns/statisticable.rb
@@ -47,7 +47,23 @@ module Statisticable
   end
 
   def generate
-    stats_methods.each { |stat_name| send(stat_name) }
+    User.transaction do
+      create_participants_table
+
+      begin
+        define_singleton_method :participants do
+          participants_class.all
+        end
+
+        stats_methods.each { |stat_name| send(stat_name) }
+      ensure
+        define_singleton_method :participants do
+          participants_from_original_table
+        end
+      end
+
+      drop_participants_table
+    end
   end
 
   def stats_methods
@@ -77,6 +93,7 @@ module Statisticable
   def participants
     @participants ||= User.unscoped.where(id: participant_ids)
   end
+  alias_method :participants_from_original_table, :participants
 
   def total_male_participants
     participants.male.count
@@ -151,6 +168,26 @@ module Statisticable
       participations.map { |participation| self.class.send("#{participation}_methods") }.flatten
     end
 
+    def create_participants_table
+      User.connection.create_table(
+        participants_table_name,
+        temporary: true,
+        as: participants_from_original_table.to_sql
+      )
+    end
+
+    def drop_participants_table
+      User.connection.drop_table(participants_table_name, if_exists: true, temporary: true)
+    end
+
+    def participants_table_name
+      @participants_table_name ||= "participants_#{resource.class.table_name}_#{resource.id}"
+    end
+
+    def participants_class
+      @participants_class ||= Class.new(User).tap { |klass| klass.table_name = participants_table_name }
+    end
+
     def total_participants_with_gender
       @total_participants_with_gender ||= participants.where.not(gender: nil).distinct.count
     end
diff --git a/spec/models/statisticable_spec.rb b/spec/models/statisticable_spec.rb
index 9768b39ee..f1817fbbd 100644
--- a/spec/models/statisticable_spec.rb
+++ b/spec/models/statisticable_spec.rb
@@ -8,6 +8,11 @@ describe Statisticable do
       def participants
         User.all
       end
+      alias_method :participants_from_original_table, :participants
+
+      def total_participants
+        User.count
+      end
 
       def participation_date
         Time.current
@@ -17,7 +22,7 @@ describe Statisticable do
     stub_const("DummyStats", dummy_stats)
   end
 
-  let(:stats) { DummyStats.new(nil) }
+  let(:stats) { DummyStats.new(double(id: 1, class: double(table_name: ""))) }
 
   describe "#gender?" do
     context "No participants" do
@@ -194,4 +199,26 @@ describe Statisticable do
       end
     end
   end
+
+  describe "#generate" do
+    it "drops the temporary table after finishing" do
+      stats.generate
+
+      expect { stats.send(:participants_class).first }.to raise_exception(ActiveRecord::StatementInvalid)
+    end
+
+    it "can be executed twice without errors" do
+      stats.generate
+
+      expect { stats.generate }.not_to raise_exception
+    end
+
+    it "can be executed twice in parallel since it uses a transaction" do
+      other_stats = DummyStats.new(stats.resource)
+
+      [stats, other_stats].map do |stat|
+        Thread.new { stat.generate }
+      end.each(&:join)
+    end
+  end
 end