Question

I need to set a Lable on a contact record based on finding a duplicate email in the contact table. The duplicate label field is in the contacts_cstm field.

This SP updates all of the records, not just the one submitted.

 @EMAIL1 NVARCHAR (100)
 AS
 BEGIN  

SET NOCOUNT ON;
update CONTACTS_CSTM set DUPLICATE_CONTACT_C = 'DUPLICATE' 
 where (select count(EMAIL1)  from CONTACTS as C   
 where C.EMAIL1 = @EMAIL1 ) >1  

I want to this to update when the count of the contact’s email is >1.

Answer 1

Your where clause does not constrain the table you are updating. You need to equate some column of C with some column of CONTACTS_CSTM,