现有用户信息表user_info（uid用户ID，nick_name昵称, achievement成就值, level等级, job职业方向, register_time注册时间）： id uid nick_name achievement level job register_time 1 1001 牛客1号 1000 2 算法 2020-01-01 10:00:00 2 1002 牛客2号 1200 3 算法 2020-01-01 10:00:00 3 1003 进击的3号 2200 5 算法 2020-01-01 10:00:00 4 1004 牛客4号 2500 6 算法 2020-01-01 10:00:00 5 1005 牛客5号 3000 7 C++ 2020-01-01 10:00:00 试卷作答记录表exam_record（uid用户ID, exam_id试卷ID, start_time开始作答时间, submit_time交卷时间, score得分）： id uid exam_id start_time submit_time score 1 1001 9001 2020-01-02 09:01:01 2020-01-02 09:21:59 80 3 1001 9002 2021-02-02 19:01:01 2021-02-02 19:30:01 87 2 1001 9001 2021-05-02 10:01:01 (NULL) (NULL) 4 1001 9001 2021-06-02 19:01:01 2021-06-02 19:32:00 20 6 1001 9002 2021-09-01 12:01:01 (NULL) (NULL) 5 1001 9002 2021-09-05 19:01:01 2021-09-05 19:40:01 89 11 1002 9001 2020-01-01 12:01:01 2020-01-01 12:31:01 81 12 1002 9002 2020-02-01 12:01:01 2020-02-01 12:31:01 82 13 1002 9002 2020-02-02 12:11:01 2020-02-02 12:31:01 83 7 1002 9002 2021-05-05 18:01:01 2021-05-05 18:59:02 90 16 1002 9001 2021-09-06 12:01:01 2021-09-06 12:21:01 80 17 1002 9001 2021-09-06 12:01:01 (NULL) (NULL) 18 1002 9001 2021-09-07 12:01:01 (NULL) (NULL) 8 1003 9003 2021-02-06 12:01:01 (NULL) (NULL) 9 1003 9001 2021-09-07 10:01:01 2021-09-07 10:31:01 89 10 1004 9002 2021-08-06 12:01:01 (NULL) (NULL) 14 1005 9001 2021-02-01 11:01:01 2021-02-01 11:31:01 84 15 1006 9001 2021-02-01 11:01:01 2021-02-01 11:31:01 84 题目练习记录表practice_record（uid用户ID, question_id题目ID, submit_time提交时间, score得分）： id uid question_id submit_time score 1 1001 8001 2021-08-02 11:41:01 60 2 1002 8001 2021-09-02 19:30:01 50 3 1002 8001 2021-09-02 19:20:01 70 4 1002 8002 2021-09-02 19:38:01 70 5 1003 8002 2021-09-01 19:38:01 80 请找到昵称以『牛客』开头『号』结尾、成就值在1200~2500之间，且最近一次活跃（答题或作答试卷）在2021年9月的用户信息。 由示例数据结果输出如下： uid nick_name achievement 1002 牛客2号 1200 解释：昵称以『牛客』开头『号』结尾且成就值在1200~2500之间的有1002、1004； 1002最近一次试卷区活跃为2021年9月，最近一次题目区活跃为2021年9月；1004最近一次试卷区活跃为2021年8月，题目区未活跃。 因此最终满足条件的只有1002。
示例1

输入

drop table if exists user_info,exam_record,practice_record;
CREATE TABLE user_info (
    id int PRIMARY KEY AUTO_INCREMENT COMMENT '自增ID',
    uid int UNIQUE NOT NULL COMMENT '用户ID',
    `nick_name` varchar(64) COMMENT '昵称',
    achievement int COMMENT '成就值',
    level int COMMENT '用户等级',
    job varchar(32) COMMENT '职业方向',
    register_time datetime COMMENT '注册时间'
)CHARACTER SET utf8 COLLATE utf8_general_ci;

CREATE TABLE practice_record (
    id int PRIMARY KEY AUTO_INCREMENT COMMENT '自增ID',
    uid int NOT NULL COMMENT '用户ID',
    question_id int NOT NULL COMMENT '题目ID',
    submit_time datetime COMMENT '提交时间',
    score tinyint COMMENT '得分'
)CHARACTER SET utf8 COLLATE utf8_general_ci;

CREATE TABLE 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;

INSERT INTO user_info(uid,`nick_name`,achievement,level,job,register_time) VALUES
  (1001, '牛客1号', 1000, 2, '算法', '2020-01-01 10:00:00'),
  (1002, '牛客2号', 1200, 3, '算法', '2020-01-01 10:00:00'),
  (1003, '进击的3号', 2200, 5, '算法', '2020-01-01 10:00:00'),
  (1004, '牛客4号', 2500, 6, '算法', '2020-01-01 10:00:00'),
  (1005, '牛客5号', 3000, 7, 'C++', '2020-01-01 10:00:00');

INSERT INTO practice_record(uid,question_id,submit_time,score) VALUES
(1001, 8001, '2021-08-02 11:41:01', 60),
(1002, 8001, '2021-09-02 19:30:01', 50),
(1002, 8001, '2021-09-02 19:20:01', 70),
(1002, 8002, '2021-09-02 19:38:01', 70),
(1003, 8002, '2021-09-01 19:38:01', 80);

INSERT INTO exam_record(uid,exam_id,start_time,submit_time,score) VALUES
(1001, 9001, '2020-01-02 09:01:01', '2020-01-02 09:21:59', 80),
(1001, 9001, '2021-05-02 10:01:01', null, null),
(1001, 9002, '2021-02-02 19:01:01', '2021-02-02 19:30:01', 87),
(1001, 9001, '2021-06-02 19:01:01', '2021-06-02 19:32:00', 20),
(1001, 9002, '2021-09-05 19:01:01', '2021-09-05 19:40:01', 89),
(1001, 9002, '2021-09-01 12:01:01', null, null),
(1002, 9002, '2021-05-05 18:01:01', '2021-05-05 18:59:02', 90),
(1003, 9003, '2021-02-06 12:01:01', null, null),
(1003, 9001, '2021-09-07 10:01:01', '2021-09-07 10:31:01', 89),
(1004, 9002, '2021-08-06 12:01:01', null, null),
(1002, 9001, '2020-01-01 12:01:01', '2020-01-01 12:31:01', 81),
(1002, 9002, '2020-02-01 12:01:01', '2020-02-01 12:31:01', 82),
(1002, 9002, '2020-02-02 12:11:01', '2020-02-02 12:31:01', 83),
(1005, 9001, '2021-02-01 11:01:01', '2021-02-01 11:31:01', 84),
(1006, 9001, '2021-02-01 11:01:01', '2021-02-01 11:31:01', 84),
(1002, 9001, '2021-09-06 12:01:01', '2021-09-06 12:21:01', 80),
(1002, 9001, '2021-09-06 12:01:01', null, null),
(1002, 9001, '2021-09-07 12:01:01', null, null);

输出

1002|牛客2号|1200
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