AWS CLI for S3 Select

Question

I have the following code, which is used to run a SQL query on a keyfile, located in a S3 bucket. This runs perfectly. My question is, I do not wish to have the output written over to an output file. Could I see the output on the screen (my preference #1)? If not, what about an ability to append to the output file, rather than over-write it (my preference #2). I am using the AWS-CLI binaries to run this query. If there is another way, I am happy to try (as long as it is within bash)

aws s3api select-object-content \
    --bucket "project2" \
    --key keyfile1 \
    --expression "SELECT * FROM s3object s where Lower(s._1) = '[email protected]'" \
    --expression-type 'SQL' \
    --input-serialization '{"CSV": {"FieldDelimiter": ":"}, "CompressionType": "GZIP"}' \
    --output-serialization '{"CSV": {"FieldDelimiter": ":"}}' "OutputFile"

Answer 1

Of course, you can use AWS CLI to do this since stdout is just a special file in linux.

aws s3api select-object-content \
--bucket "project2" \
--key keyfile1 \
--expression "SELECT * FROM s3object s where Lower(s._1) = '[email protected]'" \
--expression-type 'SQL' \
--input-serialization '{"CSV": {"FieldDelimiter": ":"}, "CompressionType": "GZIP"}' \
--output-serialization '{"CSV": {"FieldDelimiter": ":"}}' /dev/stdout

Note the /dev/stdout in the end.