select aaa.*,bbb.xh from
(select xn,xq,kcdm,kcmc,xf,xkkh,kcxz from jxrwbview where xn='2017-2018' group by xn,xq,kcdm,kcmc,xf,xkkh,kcxz ) aaa
inner join
(select distinct xkkh,xh from xsxkb where xn='2017-2018' ) bbb
on aaa.xkkh=bbb.xkkh
select aaa.*,bbb.xh from
(select xn,xq,kcdm,kcmc,xf,xkkh,kcxz from jxrwbview where xn='2017-2018' group by xn,xq,kcdm,kcmc,xf,xkkh,kcxz ) aaa
inner join
(select distinct xkkh,xh from xsxkb where xn='2017-2018' ) bbb
on aaa.xkkh=bbb.xkkh