I have test classes that have been built using the @IsTest(SeeAllData=true) however, to my understanding it's not the best practice. Do I need to rewrite new test.classes using @IsTest(SeeAllData=false) or can I just replace the original code and then redeploying via a force.com tool?

I have test classes that have been built using the @IsTest(SeeAllData=true) however, to my understanding it's not the best practice. Do I need to rewrite new test.classes using @IsTest(SeeAllData=false) or can I just replace the original code and then redeploying via a force.com tool?

Hi, I am working on setting up an email notification to be sent once an account record is deleted. I have looked into workflows but it would seem a trigger is a better avenue of approach. I am still learning how to write triggers so am not 100% sure how to leverage once a record is deleted. Any suggestions would be great. Thanks!