sql 分组查询满足条件所以数据

1 select distinct t1.pciBillID,
2   STUFF((SELECT  distinct t2.Invoicenumber+ ‘,‘
3          from TB_PCustomerInvoiceextend t2
4          where t1.pciBillID = t2.pciBillID
5             FOR XML PATH(‘‘), TYPE
6             ).value(‘.‘, ‘NVARCHAR(MAX)‘) 
7         ,1,0,‘‘) data
8 from TB_PCustomerInvoiceextend t1) AS Invoicinfo