只要没有混合的类型表达式，就可以在常数说明中使用算术运算符。
You can use arithmetic operators within your constant declarations as long as there are no mixed type expressions.
至此，您可能想知道不同数值类型在单个表达式中混合出现的时候怎么办。
By now, you're probably wondering what happens when the different numerical types are mixed in a single expression.
如果在表达式中混合使用无符号和有符号的32位整数，并将其赋值给一个有符号的long类型，那么将其中一个操作数转换成64位的类型。
In cases where unsigned and signed 32-bit integers are mixed in an expression and assigned to a signed long, cast one of the operands to its 64-bit type.
一般而言，XML查询表达式的结果可由异构的元素序列、属性和所有混合类型的原始值构成。
In general, the result of an expression in an XML query may consist of a heterogeneous sequence of elements, attributes, and primitive values, all of mixed type.
一般而言，XML查询表达式的结果可由异构的元素序列、属性和所有混合类型的原始值构成。
In general, the result of an expression in an XML query may consist of a heterogeneous sequence of elements, attributes, and primitive values, all of mixed type.
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