下面即将讨论的所有限制都适用于存储过程语言。
All the restrictions discussed below are applicable within the stored procedural language.
我们将用php编写示例程序，但是其基本概念适用于所有的编程语言。
Programming examples use PHP, but the basic concepts apply for any programming language.
所有优化准则同样适用于使用XQuery语言编写的查询。
All optimization guidelines are also applicable to queries written in the XQuery language.
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