Power Query Append
Stack files or tables with the same logical columns.
What this solves
Combine weekly production exports. This pattern is useful when the business question is clear but a generic tutorial is too abstract.
The rule
Standardize column names and types before appending.
Home → Append Queries → select tablesGoogle Sheets: The core pattern is also usable in Google Sheets; exact function support and locale separators can differ.
Real-work checklist
- Define the business key and expected grain before writing the formula, query or markup.
- Test the pattern on a small known sample where you can verify the answer manually.
- Check missing values, duplicates and data types before trusting a large result.
- Scale to the real file or database only after the logic is proven.
Common mistake
A renamed or missing source column can create unexpected nulls after refresh.