Any column can be sorted, but you must specifically state what the sort order is.
I assume you are doing this through enterprise manager. If my assumption is wrong, then let me know.
Right click on a table -> Open Table -> Return All Rows
At this point, you will see your data.
Right click on the data -> Show Panes -> SQL
At this point, the window will divide vertically. At the top you will see something like, Select * From TableName. Modify this to... Select * From TableName Order By [ColumnName]
Most likely you will need to do this every time you open the table.
-George
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