public void Extract_Year()
{
var date = new SqlDateTime(1980, 02, 05, 18, 20, 11, 32);
var value = Select("EXTRACT", SqlExpression.Constant(date), SqlExpression.Constant("year"));
Assert.IsNotNull(value);
Assert.IsFalse(value.IsNull);
Assert.IsInstanceOf<NumericType>(value.Type);
Assert.IsInstanceOf<SqlNumber>(value.Value);
Assert.AreEqual(new SqlNumber(1980), value.Value);
}