Sie können Ihre E-Mail-Liste in XML konvertieren und dann das XML mit .nodes abfragen und .value .
declare @T table
(
ID int,
Emails varchar(100)
)
insert into @T values
(1, 'example@sqldat.com, example@sqldat.com'),
(2, 'example@sqldat.com, example@sqldat.com')
select T.Email, count(*) as [Count]
from (
select X.N.value('.', 'varchar(30)') as Email
from @T
cross apply (select cast('<x>'+replace(Emails, ', ', '</x><x>')+'</x>' as xml)) as T(X)
cross apply T.X.nodes('/x') as X(N)
) as T
group by T.Email
Ergebnis:
Email Count
------------------------------ -----------
example@sqldat.com 1
example@sqldat.com 2
example@sqldat.com 1
