多個left join 產生多個結果

select a.*, to_char(To_date(20160403000000, 'yyyyMMddhh24miss'),'yyyy/mm/dd') as omc_start_time, to_char(To_date(20160404000000, 'yyyyMMddhh24miss'),'yyyy/mm/dd') as omc_end_time, ROU

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