现有一张试卷作答记录表exam_record，其中包含多年来的用户作答试卷记录，结构如下表： Filed Type Null Key Extra Default Comment id int(11) NO PRI auto_increment (NULL) 自增ID uid int(11) NO (NULL) 用户ID exam_id int(11) NO (NULL) 试卷ID start_time datetime NO (NULL) 开始时间 submit_time datetime YES (NULL) 提交时间 score tinyint(4) YES (NULL) 得分 请删除exam_record表中所有记录，并重置自增主键。 后台会通过SELECT table_rows, auto_increment FROM information_schema.tables WHERE table_name='exam_record' 语句来对比输出结果
示例1
输入
drop table if EXISTS exam_record;
CREATE TABLE IF NOT EXISTS exam_record (
id int PRIMARY KEY AUTO_INCREMENT COMMENT '自增ID',
uid int NOT NULL COMMENT '用户ID',
exam_id int NOT NULL COMMENT '试卷ID',
start_time datetime NOT NULL COMMENT '开始时间',
submit_time datetime COMMENT '提交时间',
score tinyint COMMENT '得分'
)CHARACTER SET utf8 COLLATE utf8_general_ci;
TRUNCATE exam_record;
INSERT INTO exam_record(uid, exam_id, start_time, submit_time, score) VALUES
(1001, 9001, '2020-01-01 22:11:12', '2020-01-01 23:16:12', 50),
(1001, 9002, '2020-01-02 09:01:01', '2020-01-02 09:06:00', 58);
加载中...