Closes the window without saving any changes.
Adds the expression to the Column Mapping window. Any syntax or other errors in the expression result in an error message that you can use to help diagnose the problem.
Use this area to add keywords, operators, statements, and other components of the expression to the source column names.
Double-click one or more source column names to add the columns to the editing area. The column names are automatically prefixed by a colon (:), which is required for the expression.
For new target tables, enter the name of the target column that you want to be populated by the expression. For existing target tables, choose the target column name.
Validates the syntax of any SQL statements that are part of the expression.