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srilakshmi1.387861669756762E12srilakshmi1.387861669756762E12 

what happen when we write "AND(NOT(ISNEW()),ISCHANGED(INDUSRTY)" in account validation rules?

please explain the process for  creating a new account record ,for updating exciting record quickly 
AgiAgi
This validation doesn't let you to modify the Industry field on existing accounts
AND(NOT(ISNEW()),ISCHANGED(Industry ))


if account was created without an industry value, this would allow you to choose an industry on these existing accounts but doesn't let you to modify existing values
AND(
NOT(ISNEW()),
ISCHANGED(Industry ),
TEXT(PRIORVALUE(Industry)) <> "")