使用 ON DUPLICATE KEY UPDATE，每行的受影响行值为 1，如果该行作为新行插入，如果更新现有行，则为 2，并且0 如果现有行设置为其当前值

With ON DUPLICATE KEY UPDATE, the affected-rows value per row is 1 if the row is inserted as a new row, 2 if an existing row is updated, and 0 if an existing row is set to its current values

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