I will standardize your order CSV files and report duplicates and conflicts

Taiwan

I speak Chinese, English

CSV and Excel Data Cleaning with Traceable Outputs

I clean and structure supplied CSV and Excel data with documented field mapping, duplicate and conflict checks, exception reports, and source-row references. I also build and test small browser and Py...
About this Gig

I will standardize up to 2 UTF-8 comma-separated CSV files (max 1 MiB each; 100 data rows total) into 4 agreed fields: order identifier, SKU, quantity, recipient.


Before work starts, send anonymized samples and confirm the order identifier + SKU line-item key and how repeats, variants, split shipments, corrections, returns, and cancellations should be handled.


Deliverables:

- clean.csv

- duplicates.csv for conflict-free exact duplicates

- issues.csv for invalid/conflicting rows

- short field/rule guide


Every output row keeps its source filename and row reference. Nothing is silently dropped. Header, parse, or mapping failures become batch issues; invalid data rows remain in issues. If rows sharing the confirmed key disagree on quantity or recipient, the entire key group is quarantined.


Includes 1 consolidated revision using the original files and agreed rules.


Excludes login, scraping, OCR, Excel, non-UTF-8, APIs, integrations, complex calculations, and unsupported reconstruction. The gallery uses synthetic data and was developed with AI assistance, code review, and browser checks; it is not client work or a compatibility claim.