一些函数的输入是数值，比如字符串函数的起始、长度和偏移量参数。

For some functions, a numeric value is input, for example start, length, and offset parameters of string functions.

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除了输入字符串之外，SUBSTRING函数还有其他三个参数，它们分别是：起始位置、长度和代码单元指定。

Along with the input string, the SUBSTRING function has three other arguments, which are start position, length, and code unit specification.

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这个工具会询问您一系列有关工作负载性质的问题，以便确定配置参数值的起始设置。

This tool will ask you a series of questions about the nature of the workload to determine a starting set of configuration parameter values.

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