LOG PARSERLIZARD
Tutorials · CSV files

Combine many CSV exports with SQL

Use a shared folder and wildcard to analyze monthly or departmental CSV files as one logical dataset.

Keep the schema consistent

Confirm that the files use the same delimiter, header names and data types.

Query the wildcard

SELECT Department, COUNT(*) AS Records,
  SUM(Amount) AS Total
FROM 'C:\Reports\2026-*.csv'
GROUP BY Department
ORDER BY Total DESC;

Export a focused result

Return the useful aggregation or exception records instead of creating another merged raw file.