This all falls under integrity rues and constraints. Such are usually implemented in database systems, like Oracle, DB/2, MySQL, MS SQL Server, Postgres, and many others.
ER Studio/ERwin are usually used for storing ER models. There are many alternatives out of there and some DBs have them built in these days.
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Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
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