现有一张试卷信息表examination_info，表结构如下图所示： Filed Type Null Key Extra Default Comment id int(11) NO PRI auto_increment (NULL) 自增ID exam_id int(11) NO UNI (NULL) 试卷ID tag char(32) YES (NULL) 类别标签 difficulty char(8) YES (NULL) 难度 duration int(11) NO (NULL) 时长 release_time datetime YES (NULL) 发布时间 请把examination_info表中tag为PYTHON的tag字段全部修改为Python。 后台会通过执行'SELECT exam_id,tag,difficulty,duration,release_time FROM examination_info;'语句来对比结果。
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;
TRUNCATE examination_info;
INSERT INTO examination_info(exam_id,tag,difficulty,duration,release_time) VALUES
(9001, 'SQL', 'hard', 60, '2020-01-01 10:00:00'),
(9002, 'python', 'easy', 60, '2020-01-01 10:00:00'),
(9003, 'Python', 'medium', 80, '2020-01-01 10:00:00'),
(9004, 'PYTHON', 'hard', 80, '2020-01-01 10:00:00');
输出
9001|SQL|hard|60|2020-01-01 10:00:00
9002|python|easy|60|2020-01-01 10:00:00
9003|Python|medium|80|2020-01-01 10:00:00
9004|Python|hard|80|2020-01-01 10:00:00
加载中...