CODEWITHSUNDEEP
entity-relationshiperd
Mohammad Salehi
Mohammad Salehi

Reputation: 776

what is 1..n, ?..m and these symbols in ERD?

I'm new to ERD, I know 1:1 means one to one. 1:n one to many. m:1 many to one. m:n many to many

but what are these symbols mean is ERD?
image from "software idea modeler v11.55": http://s8.picofile.com/file/8326381876/Capture.JPG here are symbols

Upvotes: 0

Views: 1941

Answers (1)

eNinjaPL
eNinjaPL

Reputation: 23

n means exactly number

You can replace n with any number needed for your database model.

read more about this cheatsheet: http://www.32geeks.com/classes/resources/IDEF1X_Cheat_Sheet.pdf

Upvotes: 1

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