数据库创建及删除唯一索引

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alter table `lob_etymon` drop index `u_lob_id_code_status`;
alter table `lob_etymon` drop index `u_lob_id_name_status`;

alter table `lob_etymon` add unique key `u_lob_id_code` (`lob_id`,`en_name`);
alter table `lob_etymon` add unique key `u_lob_id_name` (`lob_id`,`cn_name`);