Run an S3 Select SQL query against CSV/JSON/Parquet objects with mc sql

domain: min.io · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. Run `mc sql --query "SELECT * FROM S3Object" ALIAS/BUCKET/obj` to query a single object, or add `--recursive` to run against all objects under a bucket/prefix.
  2. Pass input format flags by type: `--csv-input` (with `fh=NONE|IGNORE|USE` for header handling), `--json-input`, or rely on Parquet auto-interpretation.
  3. Control output with `--csv-output` (plus `--csv-output-header`) or `--json-output` (RecordDelimiter `rd=`).
  4. Use standard SQL, e.g. `mc sql --query "SELECT count(s.power) FROM S3Object" ALIAS/BUCKET/obj.csv`.
  5. Pass `--compression GZIP|BZIP2` (or ZSTD/LZ4/SNAPPY on MinIO backend) for compressed input.

Known gotchas

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