chapter47.amp

%%[
  /* Declare variables */
  Var @rows, @rowCount, @filterExtId
  
  /* Set the filter external ID to get the relevant data */
  set @filterExtId = "a1b2c3d4-56e7-890f-gh12-ijklmnop3456" 
  
  /* Execute the filter to retrieve rows based on the external ID */
  set @rows = ExecuteFilter(@filterExtId)
  
  /* Get the number of rows returned by the filter */
  set @rowCount = RowCount(@rows)
  
  /* Check if any rows were returned */
  If @rowCount > 0 then
    /* Loop through each row of the returned data */
    For @counter = 1 to @rowCount do
      /* Get the current row based on the counter */
      set @row = Row(@rows, @counter)
      
      /* Retrieve specific fields from the row */
      {{columnAssignments}}  

       /* Optionally: you can output these values for debugging or further use */
        OutputLine(concat({{outputLineColumns}}))
      
    Next @counter
  EndIf
]%%