数据里面，id重复，创建时间不同 --新建字段repete_flag--针对重复id的数据，打标记updateyg_gate_base_bsetrepete_flag='REPETE'WHEREidIN(selectidfromyg_gate_base_bgroupbyidhavingcount(*)>1) select*fromyg_gate_base_bwhererepete_flag=