Blog
Guides, updates, and best practices for CSV & Excel workflows.
Merge CSV/XLSX files and align mismatched headers
How to merge multiple spreadsheets even when the columns don’t match, by aligning on column names.
merge · xlsx · csv
By Oriah Editorial Team • 2 min read • 261 words
Feb 05, 2026
Remove duplicates: full-row vs key-based deduplication
Learn when to deduplicate by full row and when to use a key column such as email or id.
deduplicate · csv
By Oriah Editorial Team • 1 min read • 188 words
Feb 05, 2026
Split a CSV like a pro (without breaking headers)
How to split large CSV files into smaller parts while preserving headers and avoiding common pitfalls.
csv · split · data
By Oriah Editorial Team • 2 min read • 411 words
Feb 05, 2026
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