Specification Clause No's 规范要求条款号
Each probe clause consists of a probe point specification statement, action block, and an optional predicate.
每个探测子句由一个探测点指定语句、动作块和可选的断言组成。
It is interesting to note how the WHERE clause preceded the recursive specification.
令人感兴趣的是，where子句在递归说明之前。
Creation of external tables also includes a USING clause in addition to the column specification.
除列指定之外，外部表的创建还包含一个using子句。
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