When Your Data Sources Disagree: Designing a Database That Preserves the Truth A company is preparing to replace three old systems with one new database. The CRM says customer 1842 is called Northstar Labs. The billing system says Northstar Laboratories Ltd. A...
External IDs Are Not Your IDs: Modeling Identity Across Systems A backend team adds one column to the customer table: stripe_customer_id Six months later, another integration arrives: hubspot_contact_id Then the company migrates its support platform, imports customers...
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