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Skip insert in SQL if duplicate exists.

Last Modified: 2015-08-18
I want to skip or ignore an insert if the values already exist in the table. Below is the SQL I am trying to use but it doesn't seem to work. Can someone assist? I am filling in the values, but they are normally entered by variables in my application and this query is in a loop... that's why I want to ignore if a duplicate exists. Thank you.

            WHERE hello
            NOT IN      (SELECT [ID], [hello]
                         FROM myTable
                         WHERE ID = 5
                         AND AccessID = hello
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SQL Server Data Dude
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