| 1. | Is a constant expression that can reference variables
是可以引用变量的常量表达式。 |
| 2. | For more information about constant - foldable expressions , see
有关可折叠常量表达式的详细信息，请参阅 |
| 3. | This is most commonly used expression . constant holds just one value and creates a solid grayscale color
这是最简单的一种常量表达式，因为其中只包含一个值，可以单独创建一个纯色。 |
| 4. | Takes a transformation expression consisting of template variables and constant expressions and returns the resulting syntax object
接受一个转换表达式（由模板变量和常量表达式组成）并返回产生的语法对象。 |
| 5. | Are constant expressions that can reference variables and functions . these include user - defined type variables and user - defined functions
为常量表达式，可以引用变量和函数，其中包括用户定义类型变量和用户定义函数。 |
| 6. | By default , parameters can take the place only of constant expressions ; they cannot be used instead of table names , column names , or the names of other database objects
默认情况下，参数只能代替常量表达式，而不能用于代替表名、列名或其他数据库对象的名称。 |
| 7. | When considering eligibility for forced parameterization , sql server considers an expression to be constant - foldable when either of the following conditions is true
在考虑是否能够强制参数化时， sql server将认为满足下列条件之一的表达式是可折叠常量表达式： |
| 8. | Although constructing elements from constant expressions , as shown in this example , is useful , the true power of this xquery language feature is the ability to construct xml that dynamically extracts data from a database
尽管从常量表达式构造元素（如本例所示）很有用，但是此xquery语言功能的真正作用是构造能够从数据库动态提取数据的xml 。 |
