我下载了一个公司已收料未请款的报表,看代码时对以下代码颇为不解,为什么这里的RECEIPT_DATE筛选时transaction_type 包括'RETURN TO VENDOR'呢?我实在时想不明白,希望各位大虾给予指点…………(select max(rt.transaction_date) Receipt_Date,rt.PO_LINE_LOCATION_IDfrom rcv_transactions rtwherert.organization_id=933AND rt.transaction_type IN('RECEIVE','RETURN TO VENDOR')group by rt.PO_LINE_LOCATION_ID ) a