Operator precedence defines how an expression evaluates when several operators are present 运算符的优先级决定了存在多个运算符时一个表达式各部分的计算顺序。
By enclosing an expression in parentheses , you force that expression to be evaluated first , regardless of operator precedence 通过将表达式放在括号中,将强制首先计算该表达式,而不管运算符优先级如何。
In these complex expressions , the operators are evaluated in order based on the sql server definition of operator precedence 在这些复杂表达式中,运算符将根据sql server运算符优先级定义按顺序进行计算。
Creating complex expressions such as the one in the preceding example requires a thorough understanding of the rules of operator precedence 创建前面示例中这样的复杂表达式要求彻底理解运算符优先级的规则。
When several operations occur in an expression , each part is evaluated and resolved in a predetermined order called operator precedence 如果表达式中出现几种运算,将按照预先确定的称为“运算符优先级”的顺序计算和解析各个部分。