这对于不从任何表或视图进行读取的查询是有意义的。
It's useful for queries that don't read from any tables or views.
在有些情况下，视图将向您提供可能的值的下拉列表；对于任何有可能减少由输入过失引入的错误的情况，视图都将向您提供这种下拉列表。
In some cases, you will be presented with a drop down list of possible values; this is done wherever possible to reduce errors introduced by typographical mistakes.
对于流行的Jakarta Struts mvc框架，Velocity可以与基于JSP的视图技术协作，也可以和选择的任何模型技术进行交互。
In the case of the popular Jakarta Struts MVC framework, Velocity can work alongside JSP-based view technology and interoperates with any choice of model technology.
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