Number of rules and rule update frequency.

规则量和规则更新频率。

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Note: the section for the rule definition is not required when you modify or update a rule using the API.

注意：当您使用API修改或者更新一个规则时，规则定义的部分是不需要的。

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To avoid too much complexity, DB2 imposes a simple rule: an UPDATE, DELETE or INSERT (data-change-operation) shall never happen in a join unless embedded in a correlated function.

为了避免太多的复杂性，DB 2强加了一条简单的规则：除非嵌入在相关的函数里面，否则UPDATE、DELETE或INSERT(数据更改操作)不应该出现在连接中。

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The one Android update to rule them all -- better known as Ice Cream Sandwich -- is penciled in for an official launch sometime in the next two months, so it's only natural for some shots to leak out.

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Haphazardly constructed over 40 years, it was based on 1960s, slide-rule era science that the Army Corps of Engineers never bothered to update, even as sophisticated computer models became the norm in engineering circles.

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