sql - Positive values from Datediff without using ABS - 


case 1 = 1 isnull(convert(varchar,datediff(day, date1, date2)),'')

i need have positive values difference, when use abs wont work varchar type. need empty string null values.

why converting varchar()? actually, question looks vaguely familiar, , think warned using varchar() without length in sql server.

if need value string , positive, conversion after abs:

coalesce(cast(abs(datediff(day, date1, date2)) varchar(255)), '')

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