select '' as xxx,pawn.propawn_price as yyy from product_pawn pawn
inner join product_history history on history.propawn_id = pawn.propawn_id
and history.prohistory_status = '0'
union
select pawn.propawn_price * 8/100 as xxx,'' as yyy from product_pawn pawn
inner join product_history history on history.propawn_id = pawn.propawn_id
and history.prohistory_status = '1'
union
select pawn.propawn_price + pawn.propawn_price * 8/100 as xxx,'' as yyy
from product_pawn pawn
inner join product_history history on history.propawn_id = pawn.propawn_id
and history.prohistory_status = '2'
union
select prosell_pricesell as xxx,'' as yyy from product_sell
where prosell_status = '5'
结果
xxx yyy
0 --- 900
0 --- 800
700 --- 0
0 --- 100
500 --- 0
我想要总和 xxx 和总和 yyy
1200 1800