To create a new column mapping for the column data set, complete the following steps.
要为Column数据集创建一个新的列映射。
Creates a new column mapping, using column names to refer to source and destination columns.
创建新的列映射，并使用列名称引用源列和目标列。
Creates a new column mapping, using column ordinals to refer to source and destination columns.
创建新的列映射，并使用列序号引用源列和目标列。
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