select sum(c_count) from (select count(*) c_count
  from VW_ZY_MZZRZY b
 where b.BRID00 = 883101 
   and b.CXBZ00 = 'Z'
   and b.ZRZYZT = '0'
   and b.CZRQSJ >= to_char(sysdate - interval '24' hour, 'yyyymmdd HH24:mi:ss')
   and b.YYID00 = '224141'
union all
select count(*) c_count
  from VW_ZY_MZZRZY b
 where b.BRID00 = 883101 
   and b.CXBZ00 = 'Z'
   and b.ZRZYZT = '0'
   and b.SFBGRQ = 1 and b.BGRQSJ >= to_char(sysdate - interval '24' hour, 'yyyymmdd HH24:mi:ss')
     and b.YYID00 = '224141')