Explain the blue-green deployment pattern applied to database migrations. How do you implement it, what challenges arise, and how do you handle the data synchronization between the blue and green environments?

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The blue-green deployment pattern for database migrations maintains two complete database environments: the current production system labeled blue and the new target system labeled green.

Explain the blue-green deployment pattern applied to database migrations. How do you implement it, what challenges arise, and how do you handle the data synchronization between the blue and green environments?

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