How can you customize migrations (e.g. modify Up/Down methods, custom SQL)?

You can manually edit migration files after scaffolding:

protected override void Up(MigrationBuilder migrationBuilder)

migrationBuilder.Sql("UPDATE Users SET IsActive = 1 WHERE

IsActive IS NULL");

• Add indexes, constraints, stored procedures.
• Use raw SQL or Fluent API.
• Be cautious to maintain idempotency and correctness.

Entity Framework Core – Change

Tracking & Concurrency