sql delete - I want to leave always one record if table record count = 1 with SQL -

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I can delete records with this SQL section, 

  remove from table ID = 2

I always need to leave a record if the calculation of the table = 1 is also "id = 2". How can I do this?

Add a WHERE segment to ensure there is more than one line: 

  Delete from the table id = 2 and (tab from selection number (*)) & gt; 1

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