How do you handle underscore

Hi everybody,

I am wondering what approach do you take in handling underscore character in searches. Do you apply some special treatment and if yes, what is your approach.

Example:

declare @t table (email varchar(100))
insert into @t (email) values ('karen.todd@gmail.com'),('karen_todd@gmail.com')

declare @searchStr varchar(20) = 'karen_todd'

select * from @t where email like '%' + @searchStr + '%'

Even with the variable we're getting both rows as a result while we clearly intended to only find one row.

So, I am wondering as how do you normally treat this situation in your code. 

Thanks in advance.

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