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I expect the column to be a VARCHAR2, in my Oracle Database.
US Zips are 9.
Canadian is 7.
I am thinking 32 characters would be reasonable upper limit
What am I missing?
[EDIT] TIL: 12 is a reasonable answer to the question Thanks to everyone who contributed.
Skimming through Wikipedia’s Postal Codes page, 32 characters should be more than enough. I would say even 16 characters is good.