ddl+dml

?
CREATE TABLE `student` (`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '學號',`createDate` datetime DEFAULT NULL,`userName` varchar(20) DEFAULT NULL,`pwd` varchar(36) DEFAULT NULL,`phone` varchar(11) DEFAULT NULL,`age` tinyint(3) unsigned DEFAULT NULL,`sex` char(2) DEFAULT '男',`introduce` varchar(255) DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;CREATE TABLE `result` (`rid` int(11) NOT NULL AUTO_INCREMENT COMMENT '成績編號',`testName` varchar(255) DEFAULT NULL COMMENT '測試名稱',`score` double(4,2) DEFAULT NULL COMMENT '成績',`studentId` int(11) DEFAULT NULL COMMENT '學生id',PRIMARY KEY (`rid`),KEY `studentId` (`studentId`),CONSTRAINT `result_ibfk_1` FOREIGN KEY (`studentId`) REFERENCES `student` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
insert into student values(0,'2024-02-25 10:10:10','趙靈兒','123',
'15612345678',16,'女','逍遙哥哥，你終于找到我了。');
insert into student values(0,'2024-02-25 10:10:10','王語嫣','123',
'15612345678',17,'女','慕容復，我和你不共戴天。');
insert into student values(0,'2024-02-25 10:10:10','龍姑娘','123',
'15612345678',22,'女','我想過過過兒過過的日子。');
insert into student values(0,'2024-02-25 10:10:10','楊過','123',
'15612345678',18,'男','一遇楊過誤終身。');
insert into student values(0,'2024-02-25 10:10:10','楊逍','123',
'15612345678',27,'男','楊過跟程英的大兒子。');
insert into student (userName,age,introduce)values('黃衣女子',26,'楊過與龍姑娘的大女兒。');insert into result values(0,'政治',96,1);
insert into result values(0,'地理',86,5);
insert into result values(0,'政治',77,3);
insert into result values(0,'英語',99,3);
insert into result values(0,'歷史',22,6);
insert into result values(0,'化學',69,2);
insert into result values(0,'Java',79,5);
insert into result values(0,'Java',67,6);
insert into result values(0,'政治',97,2);
insert into result values(0,'物理',76,6);
insert into result values(0,'物理',82,2);
insert into result values(0,'化學',56,4);?

dql

delimiter $$
CREATE PROCEDURE get_student_userName(in p_userName VARCHAR(20))
BEGIn
DECLARE p_introduce VARCHAR(255);
SELECT	introduce into p_introduce FROM student where userName=p_userName;
SELECT now()'時間',p_introduce '讀取的簡介';
END $$
delimiter;
CALL get_student_userName('趙靈兒');