alter 创建索引

alter table examination_info add index idx_duration(duration);

alter table examination_info add unique uniq_idx_exam_id(exam_id);

alter table examination_info add Fulltext full_idx_tag(tag);

create 创建索引

create index idx_duration on examination_info(duration);

create unique index uniq_idx_exam_id on examination_info(exam_id);

create fulltext index full_idx_tag on examination_info(tag);