The Derived column transformation USES values created by using expressions either to populate new columns in a data flow, or to update existing columns.

派生列转换使用通过表达式所创建的值来填充数据流中的新列或更新现有列。

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Values for the ID column of the ACCTPROFILE table are derived from the first field in the input file.

ACCTPROFILE表i d列的值是从输入文件的第一个字段派生出来的。

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After that, we need edit TARGET_ITEMID parameter, setting the parameter's value so that it is derived from the top level WI_ITEMID column table.

在此之后，我们需要编辑TARGET _ ITEMID参数，设置参数的值，这样就可以从顶级层次wi_itemid列表格中获得该参数的值。

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The number of the old requirement, from which the new requirement was derived, is shown in the next column of the spreadsheet.

WHITEHOUSE: Core Requirement Updates Description of Requirement Spreadsheets | The White House