It depends on Input Column Propagation.
Propagation OFF
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Output columns appear in exactly the same order as you list them in the Select node.
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Original DataFrame order doesn’t matter.
Propagation ON
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Output columns follow the original input DataFrame order.
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Selected columns are modified in place (rename/type change), others just pass through.
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Dropped columns are removed.
Summary:
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Want full control of order?
Turn propagation OFF -
Want to keep original order?
Turn propagation ON
