ExtractColumnBlock
Description
This block is used to extract columns from a table. This is usually used before a terminal (to save only useful columns).
Implementation

Properties
Artifacts: Artifacts created by this block
Tables: the resulting table.
Target: the table from which columns will b eextracted.
Columns: The columns to keep. Use SFormat (column/columns functions or artifact).
Advanced Properties
ColumnName: SFormat used to customize the name of the extracted columns.
Summary
