结果显示2位小数

SELECT
t.DM,??
t.HSXMFL,??
to_char(nvl(t.PERFORMED_SCALE,0),'0.99'),
to_char(nvl(t.MAKE_OUT_SCALE,0),'0.99')?
FROM HSXMFL t
ORDER BY t.DM ASC??

?

1?? 01?西药费? 0.00? 0.00
2?? 02?中成药? 0.00? 0.00
3?? 03?中草药? 1.00? 0.00
4?? 04?住院费? 0.00? 0.00
5?? 05?检查费? 0.00? 0.00
6?? 06?治疗费? 0.00? 0.00
7?? 07?放射费? 0.00? 0.00