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。
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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