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Answers and rating deltas for

I need to store postal codes in a database. How big should the column be?

Author Votes Δ
Christian C. Salvadó 38 +0.72
strager 15 +2.78
Justin Cave 6 -0.02
paxdiablo 4 -0.36
Stephan Eggermont 3 -1.29
Jay Kapasi 1 0.00
tegbains 1 -3.68
Cochise Ruhulessin 0 0.00
Last visited: Sep 14, 2014, 5:07:29 AM