执行运算

• Operators can be redefined to perform operations on custom data types
  等。可以重新定义运算符，以便可以对自定义数据类型执行运算。
• When we determine the operands and operator , we can perform the operation , as shown in
  一旦确定操作数和操作符后，就可以执行运算了，如
• Otherwise , the operation is performed using at least the range and precision of the
  类型的范围和精度执行运算，而且对于数值运算，结果的类型为
• Perform operations on text or image input values or columns , and return information about the value
  对文本或图像输入值或列执行运算，然后返回有关值的信息。
• In this lesson , you will learn how to create expressions to perform arithmetic and then return values
  在本课中，您将学习如何创建表达式以执行运算并返回值。
• Often you want operations to proceed in a different order from that determined by operator precedence
  经常需要以不同于运算符优先级所确定的顺序来执行运算。
• The nullability property of arithmetic operators over floating point data type is always nullable
  对浮点数据类型执行运算的算术运算符的为空性属性始终可为空。
• Perform operations and return information about values , objects , and settings in an instance of sql server
  执行运算后返回sql server实例中有关值、对象和设置的信息。
• Perform calculations based on input values provided as parameters to the functions , and return numeric values
  基于作为函数的参数提供的输入值执行运算，然后返回数字值。
• Perform operations on a date and time input values and return string , numeric , or date and time values
  对日期和时间输入值执行运算，然后返回字符串、数字或日期和时间值。