删除重复数据
create temporary table tmp_wrap select * from invest_institution_guild_mapping group by invest_institution_id,guild_id;
truncate table invest_institution_guild_mapping;
insert into invest_institution_guild_mapping select * from tmp_wrap;
create temporary table tmp_wrap select * from invest_institution_guild_mapping group by invest_institution_id,guild_id;
truncate table invest_institution_guild_mapping;
insert into invest_institution_guild_mapping select * from tmp_wrap;
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