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Why the Rollup field is not available for Text datatype?
Please refer to this documentation for more details on Roll Up fields : docs.microsoft.com/.../define-rollup-fields
The roll up field types are only available on certain data types to get the aggregate calculations: SUM, COUNT, MIN, MAX and AVG.
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May I know why Rollup is not available for Text datatype?
As the result of a roll up field would correspond to either of SUM, COUNT, MIN, MAX and AVG that are numbers, it is available for currency, date& time, whole number etc. and not available for Text datatype.
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