现有销售明细一份，需统计每个月首日售卖的单数、商品及平均金额，
结果四列分别为日期、商品名称、去重顿号合并、单数及平均金额
To use this workflow in KNIME, download it from the below URL and open it in KNIME:
Deploy, schedule, execute, and monitor your KNIME workflows locally, in the cloud or on-premises – with our brand new NodePit Runner.
