>>Hi,
>>Can the exp string in the following be constructed so as to return DataRows where a specific DataColumn is DBNull?
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DataRows[] drs = DataTable.Select(exp);

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>This is right off the top of my head, but maybe you could do something like this:
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>    DataRow[] dr = DataTable.Select("'TT' = ISNULL( " + DataTable.Columns[4].ColumnName.ToString() + ", 'TT')");
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Works great. (I was assuming I'd somehow have to test for DBNull)
Thx,
Viv