请教一条SQL语句的优化

select a.*,b.PRD_INST_ID,b.INSTALL_ADDR,b.PRD_INST_NAME,case c.ACT_FLAG when '1' then '活跃' else '不活跃' end flag from bdw.t_tmp a , (select * from bdw.day_562 b where PRD_INST_STAS_ID not in(110000,110098)) b, eda.V_FT_DATA_SERVICE_201604_56 ...