Key Columns

Choose which column(s) is used to determine if a row from the source matches a row from the sink.

Permitted Collection Child Definitions

Child	API Type	Description
<Column />	AstAdfDataflowKeyColumnNode	Specifies key column node.
<ColumnExpression />	AstAdfDataflowKeyColumnExpressionNode	Specifies an expression whos results are a collection of key columns.