exclude

Removes rows from input file where keys match exclusion file. Uses hash-based lookup for performance.

Write with --output. A trailing path is not a positional argument.

# Exclude rows by key
undatum exclude data.csv blacklist.csv --on email --output output.csv

# Exclude with multiple key fields
undatum exclude data.jsonl exclude.jsonl --on id,email --output output.jsonl
undatum exclude workbook.xlsx skip.csv --table Sheet2 --on city --output out.jsonl
undatum exclude nested.jsonl skip.jsonl --on capital_city.lat --flatten-nested --output out.jsonl

Key options: --on, --output, --table / --sheet and --table2 / --sheet2 for each file. Also accepts --flatten-nested, --on-error, --error-log, and --quotechar (shared options).