UnionBehavior Type
This enumeration specifies the behavior of `Union` operation on series when there are overlapping keys in two series that are being unioned. The options include preferring values from the left/right series or throwing an exception when both values are available.
Record fields
| Record Field |
Description
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When there are values available in both series that are being unioned, raise an exception.
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When there are values available in both series that are being unioned, prefer the left value.
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When there are values available in both series that are being unioned, prefer the right value.
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Deedle