报表本年对应的上一年数据为空时，将空转换为0

update session.results set tq_qty= case when tq_qty=0 or tq_qty is null then 0 else tq_qty end,

tq_zb= case when tq_zb=0 or tq_zb is null then 0 else tq_zb end,

zbadd= case when zbadd=0 or tq_zb is null then 0 else zbadd end;