title: Different behaviors for round function in sql server
body: <p>Round functions has two behaviors: With the value cours is equal to "3.1235", <code>round(cours, 3) = 3.123</code>. Although, when we replace cours by its value (3.1235) in this round formula, <code>round(3.1235, 3) = 3.1240</code>.</p>