就是 select b.account_name , case when b.time=concat(to_char(sysdate,'yyyy'),'-03-31' then b.bond_value_invest_a2 end as 债券_H2 , case when b.time=concat(to_char(sysdate,'yyyy'),'-06-30' then b.bond_value_invest_a2 end as 债券_H2 from A提示ora-01861 说是数据类型不匹配,日期那块我应该咋改啊