new guide for dates & datetimes, and updated security description
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# Data Controller for SAS® - Dates & Datetimes
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## Overview
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Dates & datetimes are actually stored as plain numerics in regular SAS tables. In order for the Data Controller to recognise these values as dates / datetimes a format must be applied.
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This format must also be present / updated in the metadata view of the (physical) table to be displayed properly. This can be done using DI Studio, or by running the following (template) code:
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```
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proc metalib;
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omr (library="Your Library");
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folder="/Shared Data/your table storage location";
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update_rule=(delete);
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run;
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```
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