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2019.6.5作业
关超的博客
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  1. 写出PDO操作数据库的基本步骤

    链接数据库,创建pdo对象

    $pdo = new PDO($DSN,$username,$password)

    执行sql语句

    创建sql语句对象  $stmt = $pdo->prepare($sql)

    执行sql查询 $stmt ->execute()

    对执行结果进行解析或进一步处理

    关闭数据库链接   $pdo = null;



2 创始一个学生数据库与学生信息表, 练习常用的增删改查语句
select, update, insert, delete


CREATE TABLE `student` (

                          `stu_id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键',

                          `name` varchar(50) NOT NULL COMMENT '姓名',

                          `age` int(10) NOT NULL COMMENT '年龄',

                          `sex` int(1) NOT NULL COMMENT '性别',

                          PRIMARY KEY (`stu_id`)



select * from student where stu_id = 10;

INSERT INTO `student` (`stu_id`, `name`, `age`, `sex`) VALUES

(1, '超', 30,1);

update student set age = 31 where stu_id= 1;

delete from student where stu_id = 1;

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