现有一张试卷信息表examination_info，其中包含各种类型试卷的信息。为了对表更方便快捷地查询，需要在examination_info表创建以下索引，规则如下： 在duration列创建普通索引idx_duration、在exam_id列创建唯一性索引uniq_idx_exam_id、在tag列创建全文索引full_idx_tag。 根据题意，将返回如下结果： examination_info 0 PRIMARY 1 id A 0 BTREE examination_info 0 uniq_idx_exam_id 1 exam_id A 0 YES BTREE examination_info 1 idx_duration 1 duration A 0 BTREE examination_info 1 full_idx_tag 1 tag 0 YES FULLTEXT 备注：后台会通过 SHOW INDEX FROM examination_info 语句来对比输出结果
示例1
输入
drop table if exists examination_info;
CREATE TABLE IF NOT EXISTS examination_info (
id int PRIMARY KEY AUTO_INCREMENT COMMENT '自增ID',
exam_id int UNIQUE NOT NULL COMMENT '试卷ID',
tag varchar(32) COMMENT '类别标签',
difficulty varchar(8) COMMENT '难度',
duration int NOT NULL COMMENT '时长',
release_time datetime COMMENT '发布时间'
)CHARACTER SET utf8 COLLATE utf8_bin;
输出
examination_info|0|PRIMARY|1|id|A|0|None|None||BTREE|||YES|None
examination_info|0|exam_id|1|exam_id|A|0|None|None||BTREE|||YES|None
examination_info|0|uniq_idx_exam_id|1|exam_id|A|0|None|None||BTREE|||YES|None
examination_info|1|idx_duration|1|duration|A|0|None|None||BTREE|||YES|None
examination_info|1|full_idx_tag|1|tag|None|0|None|None|YES|FULLTEXT|||YES|None
加载中...