oracle sql查询效率慢

Question

select * from (select my_table.*,rownum as my_rownum from(
select
a.iccid,
a.batch_id,
a.imsi_c as imsi_x,
a.state_date as create_date,
'IMSL' as imsi_x_type
from recycle_imsic a
where a.c_state='3' and a.province_id='12'
)
my_table where rownum< 5001) where my_rownum>= 1

Answer 1