diff --git a/dwh/redshift/querytkdb.sql b/dwh/redshift/querytkdb.sql
index 4c9fbbf..0f46f27 100644
--- a/dwh/redshift/querytkdb.sql
+++ b/dwh/redshift/querytkdb.sql
@@ -10,8 +10,7 @@ FROM (
   SELECT buyerid, sum(qtysold) total_quantity
   FROM sales
   GROUP BY buyerid
-  ORDER BY total_quantity desc limit 10) Q,
-  users
+  ORDER BY total_quantity desc limit 10) Q, users
 WHERE Q.buyerid = userid
 ORDER BY Q.total_quantity desc;
 
@@ -33,12 +32,12 @@ create table ext_file_upload.sales(
   commission decimal(8,2),
   saletime timestamp);
 
---load data from external file in s3
-COPY ext_file_upload.sales from 's3://abc123/sales_tab.txt'
+--load data in redshift from external file in s3
+COPY ext_file_upload.sales FROM 's3://abc123/sales_tab.txt' -- n files 's3://abc123/sales_'
 credentials 'aws_iam_role=arn:aws:iam::1234567891012:role/RedshiftS3Access' -- map the role to the cluster permissions
+region '<region>'
 delimiter '\t'
-timeformat 'MM/DD/YYYY HH:MI:SS'
-region '<region>';
+timeformat 'MM/DD/YYYY HH:MI:SS';
 
 
 --validation query: get total count of sales records
@@ -49,3 +48,10 @@ SELECT sum(qtysold)
 FROM ext_file_upload.sales s, date
 WHERE s.dateid = date.dateid
 AND caldate = '2008-01-05';
+
+
+-- unload data from redshift to s3 folder
+UNLOAD ('select * from sales') TO 's3://abc123/unload/sales_'
+iam_role 'arn:aws:iam::1234567891012:role/test-redshift-role-s3';
+
+
diff --git a/dwh/snowflake/snowpark_ml.py b/dwh/snowflake/snowpark_ml.py
index b585a98..4f7ea42 100644
--- a/dwh/snowflake/snowpark_ml.py
+++ b/dwh/snowflake/snowpark_ml.py
@@ -5,7 +5,6 @@
 
 from snowflake.snowpark import Session
 from snowflake.snowpark.functions import col, udf, sproc, call_udf
-from snowflake.snowpark.types import StructType, StructField, DecimalType, StringType
 from snowflake.snowpark.types import PandasDataFrame, PandasSeries
 
 import pandas as pd