when
'ChangeProductName'=
case --聯名借姓名
--when a.ChangeProductName is not null then (substring(a.ChangeProductName,0,charindex(',', ChangeProductName))) --聯名借姓名
--when a.ChangeProductName <> '' then (substring(a.ChangeProductName,0,charindex(',', ChangeProductName)))
when (a.ChangeProductName is not null and a.ChangeProductName <> '') then substring(a.ChangeProductName,0,charindex(',', ChangeProductName)) --聯名借姓名
end,
