title: Accuracy in rounding numbers
body: <p>I have the following requirement-</p>
  
  <pre><code>1. Get the A_MINUTES column value from TableA for all rows 
  2. Sum the A_MINUTES. 
  3. Convert the summed minutes values to hours - divide by 60 
  4. Round off the final hours value to 2 decimal places.
  </code></pre>
  
  <p>This needs to be written in SQL. </p>
  
  <p>Do you think this query will have any rounding errors?</p>
  
  <pre><code>SELECT ROUND ( (SUM(A_MINUTES)/60.0) , 2) FROM TABLEA
  </code></pre>