Validate Migration Data with Federated SQL & AI

What this video shows

A matching row count does not prove a migration preserved the data. This walkthrough uses a deliberate target-side mismatch to show the validation process — it is not a conversion failure.

• Open MySQL source and PostgreSQL target side by side
• Connect both databases in one SQL Console session
• Use short aliases to reference both versions of the table in one federated query
• Describe the validation checks in plain language
• Let AI generate SQL from the live schemas, then review it before running
• See why matching rows can still hide different revenue and minimum-order values

Use federated SQL when you need to validate actual values across systems before cutover — without exporting data or writing a separate comparison script.

The full write-up walks through the same checks on a 2.8-million-row table and shows what each one catches: How to verify a database migration before cutover.