HOW DO I COMBINE MULTIPLE CSVS INTO ONE

Hello,

You can create an athena table for taking the input locations as all the s3 prefix. Something like this, refer create table in athena

CREATE EXTERNAL TABLE `test_table`(
...
)
ROW FORMAT ...
STORED AS INPUTFORMAT ...
OUTPUTFORMAT ...
LOCATION s3://bucketname/folder/

Once create the table, use CTAS to create another table to consolidate all the csv as single table output location like below, refer here for CTAS

CREATE TABLE ctas_csv_unpartitioned 
WITH (
     format = 'CSV', 
     external_location = 's3://xxxxxxxxxxxx/ctas_csv_unpartitioned/') 
AS SELECT key1, name1, comment1
FROM test_table;