title: How to delete only one row if several found?
body: <p>I have a table that looks like this.</p>
  
  <pre><code>CREATE TABLE tshirt
  (
    id serial,
    sku character varying(255) NOT NULL
  );
  </code></pre>
  
  <p>I want to delete only one row with my wanted sku, but <code>DELETE FROM tshirt WHERE sku='%s';</code>
  deletes all entries with that sku. How can I do this ?</p>