Let : You assign values to variable with let, although ( as you 'll soon see ) you won't use let as often as you use the other FLWOR clauses. let:使用let可以为变量赋值,但是(很快将看到)和其他FLWOR子句相比,let用的比较少。
To start with, let's talk about how much money we need. 首先,让我们讨论一下我们需要多少资金。
To begin with, let me introduce Mr White to you. 首先,请允许我把怀特先生介绍给你。
The two-argument case starts off with a let expression. 两个参数的情况从let表达式开始。
You most often will use variables in XQuery as shown above, though, where the variable is created implicitly by a for clause, rather than explicitly with a let clause. 多数情况下按照上述方法使用XQuery中的变量,即通过for子句隐式建立变量,而不是使用let子句显式地定义变量。