I am sorry that I didn't explain myself correctly. There are two columns, MyField1 and MyField2. MyField1 is not unique but only unique with value of '1' in column MyField2.
>Creat Unique constraint on MyField and "MyField + '1'" will be unique as well.
>
>>After consulting my SQL Server book I am not sure Check constraint will do the job. I don't see how I can specify to check for unique expression. Here is what I was trying to do: I want to make sure that that value "MyField + '1'" is unique for all rows in the table. Could this be done with Check constraint?
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