题解 | #Where in 和Not in#
删除索引
http://www.nowcoder.com/practice/4963f6d63dde48d787aaa2b43460fb4b
alter table examination_info drop index uniq_idx_exam_id;
alter table examination_info drop index full_idx_tag;
alter table examination_info drop index uniq_idx_exam_id; alter table examination_info drop index full_idx_tag;
