常量表达式 meaning in English
constant expressions
Examples
- 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。 - 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： - 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 。