text: -- Copyright (c) 2013-2015 Snowplow Analytics Ltd. All rights reserved.
  --
  -- This program is licensed to you under the Apache License Version 2.0,
  -- and you may not use this file except in compliance with the Apache License Version 2.0.
  -- You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
  --
  -- Unless required by applicable law or agreed to in writing,
  -- software distributed under the Apache License Version 2.0 is distributed on an
  -- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  -- See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
  --
  -- Authors: Christophe Bogaert
  -- Copyright: Copyright (c) 2015 Snowplow Analytics Ltd
  -- License: Apache License Version 2.0
  --
  -- Data Model: deduplicate
  -- Version: 0.3
  
  -- Step 1:
  
  CREATE SCHEMA IF NOT EXISTS duplicates;
  
  -- Step 2: create or upgrade duplicates.events using the same definition as atomic.events
  -- https://github.com/snowplow/snowplow/blob/master/4-storage/redshift-storage/sql/atomic-def.sql
  