唯一索引

ALTER TABLE t_factor_weight ADD UNIQUE fid_fac_sym_unique_index (`fund_id`,`factor_name`,`symbol`);

ALTER TABLE t_factor_target_position ADD UNIQUE fid_factor_symbol_unique_index (`fund_id`,`factor_name`,`symbol`);

ALTER TABLE t_fund_target_position ADD UNIQUE fid_sym_unique_index (`fund_id`,`symbol`);