Find and correctly merge records that look different but are actually the same—covering case, whitespace, symbols, full/half-width, email aliases, phone country codes, approximate spelling, etc.
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Comprehensive guide to Excel deduplication retention rules: keep first, keep latest, keep max value, multi-tier rules. Provides SheetCleaner, Power Query, and Excel 365 formula implementations with complete examples and best practices.
Complete e-commerce data cleansing guide: prevent duplicate order imports, merge customer information, aggregate SKU variants. Support multi-channel order deduplication, customer CLV calculation, product inventory integration with both Power Query and SheetCleaner solutions.
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Learn how to use multi-column combinations as unique keys for deduplication, supporting keep-latest, keep-highest rules for customer, product, and order scenarios.
Professional guide for marketing email list cleaning: handle case differences, Gmail dot rules, +alias tags. Supports complex scenarios like ZHANG.SAN@EXAMPLE.COM vs zhangsan@example.com, alice+ads@gmail.com vs alice@gmail.com.
Essential skills for marketing/customer service list cleaning: standardize phone number formats, handle country codes, and keep the latest records. Supports standardization of various formats like +86 138-0000-1234, 13800001234, 086-13800001234.
Complete online collaborative data deduplication guide: Google Sheets built-in functions UNIQUE, SORTN, QUERY comparison, conditional formatting to mark duplicates, cross-sheet merge deduplication solutions. Suitable for Google Forms surveys, shared sheets, online collaboration scenarios.
