Data Reconciliation After Migration: Complete Validation in 10-30 Minutes

-- Source System
SELECT COUNT(*) as source_count FROM customers;

-- Target System  
SELECT COUNT(*) as target_count FROM customers;

-- AI validates: source_count = target_count

-- Source System
SELECT 
  SUM(order_total) as total_revenue,
  AVG(order_total) as avg_order,
  COUNT(DISTINCT customer_id) as unique_customers
FROM orders;

-- Target System (must match exactly)
SELECT 
  SUM(order_total) as total_revenue,
  AVG(order_total) as avg_order,
  COUNT(DISTINCT customer_id) as unique_customers
FROM orders;