在spj里用自己姓名拼音+学号创建一个模式。

好的，以下是用我的姓名拼音+学号创建的一个简单的 SPJ 创建模式的代码示例：
CREATE FUNCTION zhangwenyuan_123456(param1 INT, param2 VARCHAR(50))
RETURNS TABLE (col1 INT, col2 VARCHAR(50))
LANGUAGE plpgsql
AS $$
DECLARE
var1 INT;
BEGIN
SELECT COUNT(*) INTO var1 FROM my_table WHERE col3 = param1 AND col4 = param2;
IF var1 > 0 THEN
RETURN QUERY SELECT col1, col2 FROM my_table WHERE col3 = param1 AND col4 = param2;
ELSE
RETURN QUERY SELECT -1, 'No data found';
END IF;
END;
$$;

这个函数的名称是 "zhangwenyuan_123456"，接受两个参数，一个整数和一个字符串，并返回一个包含两个列的结果集。函数体内部使用查询语句来检索匹配参数条件的数据行，并将结果返回给调用者。如果没有匹配的数据行，则返回一个包含错误信息的结果集。这只是一个简单的示例，实际的 SPJ 函数可能会更复杂。

相关问题

1、使用 SQL 语句创建SPJ数据库。 2、使用 SQL 语句选择 SPJ 为当前使用数据库。 3、使用 SQL 语句在SPJ数据库中创建4个数据表：S,P,J,SPJ，不用定义实体完整性和参照完整性，待讲完有关概念后再练习。 4、使用 SQL 语句 INSERT 向 SPJ数据库中的数据表S,P,J,SPJ插入数据。 5、使用 SQL 语句 ALTER TABLE 为 S 表添加一个名为“备注”的数据列，其数据类型为 varchar(50)。 6、使用 SQL 语句创建数据库SPJ1，并在此数据库下创建表S，表结构与数据库SPJ 的 S表相同。 7、使用 SQL 语句删除 SPJ1 表中供应商代码为S2 的记录。 8、使用 SQL语句更新SPJ1库中S表中学号为供应商代码为S1的所在城市为“杭州”。 9、删除SPJ1库中S表。 10、删除数据库SPJ1。

非常抱歉，我无法执行您的请求。因为我是一个语言模型AI，并没有实际的数据库操作能力。但是我可以提供一些SQL语句的示例供您参考：

创建SPJ数据库：
CREATE DATABASE SPJ;

选择SPJ数据库：
USE SPJ;

创建S、P、J、SPJ表：

CREATE TABLE S (
 s_id INT PRIMARY KEY,
 s_name VARCHAR(50) NOT NULL,
 status INT NOT NULL,
 city VARCHAR(50) NOT NULL
);


CREATE TABLE P (
    p_id INT PRIMARY KEY,
    p_name VARCHAR(50) NOT NULL,
    color VARCHAR(20) NOT NULL,
    weight DECIMAL(5,2) NOT NULL
);
CREATE TABLE J (
    j_id INT PRIMARY KEY,
    j_name VARCHAR(50) NOT NULL,
    city VARCHAR(50) NOT NULL
);
CREATE TABLE SPJ (
    s_id INT,
    p_id INT,
    j_id INT,
    quantity INT NOT NULL,
    PRIMARY KEY(s_id, p_id, j_id)
);

4. 向S、P、J、SPJ表插入数据：

INSERT INTO S VALUES (1, 'Jim', 0, 'Shanghai');
INSERT INTO S VALUES (2, 'Lucy', 1, 'Beijing');
INSERT INTO S VALUES (3, 'Tom', 0, 'Guangzhou');
INSERT INTO P VALUES (1, 'Pen', 'Red', 0.2);
INSERT INTO P VALUES (2, 'Book', 'Blue', 0.5);
INSERT INTO P VALUES (3, 'Pencil', 'Black', 0.1);
INSERT INTO J VALUES (1, 'Factory A', 'Shanghai');
INSERT INTO J VALUES (2, 'Factory B', 'Beijing');
INSERT INTO J VALUES (3, 'Factory C', 'Guangzhou');
INSERT INTO SPJ VALUES (1, 1, 1, 100);
INSERT INTO SPJ VALUES (1, 2, 2, 200);
INSERT INTO SPJ VALUES (2, 1, 3, 50);

5. 为S表添加备注列：

ALTER TABLE S ADD COLUMN Remarks VARCHAR(50);

6. 创建SPJ1数据库，并在其中创建S表：

CREATE DATABASE SPJ1;
USE SPJ1;
CREATE TABLE S LIKE SPJ.S;

7. 删除SPJ1表中供应商代码为S2的记录：

DELETE FROM S WHERE s_id = 2;

8. 更新SPJ1库中S表中学号为供应商代码为S1的所在城市为“杭州”：

UPDATE S SET city = 'Hangzhou' WHERE s_id = 1;

9. 删除SPJ1库中S表：

DROP TABLE S;

10. 删除数据库SPJ1：

DROP DATABASE SPJ1;

用spj+MySQL+servlet+dao实现增删查改的简单代码

<p>以下是使用SPJ（Spring+JPA）、MySQL数据库、Servlet和DAO实现增删查改的简单代码示例：</p>
<p>Student.java（学生实体类）</p>
<pre><code class="language-java">@Entity
@Table(name = &quot;student&quot;)
public class Student {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
private Integer age;
private Float score;

// getter和setter方法
}
</code></pre>
<p>StudentDao.java（学生DAO接口）</p>
<pre><code class="language-java">public interface StudentDao {
List&lt;Student&gt; findAll();
Student findById(Long id);
void save(Student student);
void update(Student student);
void delete(Student student);
}
</code></pre>
<p>StudentDaoImpl.java（学生DAO实现类）</p>
<pre><code class="language-java">@Repository
public class StudentDaoImpl implements StudentDao {
@PersistenceContext
private EntityManager entityManager;

@Override
public List&lt;Student&gt; findAll() {
return entityManager.createQuery(&quot;SELECT s FROM Student s&quot;, Student.class).getResultList();
}

@Override
public Student findById(Long id) {
return entityManager.find(Student.class, id);
}

@Override
public void save(Student student) {
entityManager.persist(student);
}

@Override
public void update(Student student) {
entityManager.merge(student);
}

@Override
public void delete(Student student) {
entityManager.remove(student);
}
}
</code></pre>
<p>StudentServlet.java（学生Servlet）</p>
<pre><code class="language-java">@WebServlet(&quot;/student/*&quot;)
public class StudentServlet extends HttpServlet {
private StudentDao studentDao;

@Override
public void init() throws ServletException {
super.init();
studentDao = new StudentDaoImpl();
}

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String pathInfo = request.getPathInfo();
if (pathInfo == null || pathInfo.equals(&quot;/&quot;)) {
List&lt;Student&gt; students = studentDao.findAll();
request.setAttribute(&quot;students&quot;, students);
request.getRequestDispatcher(&quot;/WEB-INF/views/student/list.jsp&quot;).forward(request, response);
} else if (pathInfo.equals(&quot;/add&quot;)) {
request.getRequestDispatcher(&quot;/WEB-INF/views/student/add.jsp&quot;).forward(request, response);
} else if (pathInfo.matches(&quot;/\\d+&quot;)) {
Long id = Long.parseLong(pathInfo.substring(1));
Student student = studentDao.findById(id);
if (student != null) {
request.setAttribute(&quot;student&quot;, student);
request.getRequestDispatcher(&quot;/WEB-INF/views/student/edit.jsp&quot;).forward(request, response);
} else {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
} else {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
}
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String pathInfo = request.getPathInfo();
if (pathInfo == null || pathInfo.equals(&quot;/&quot;)) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
} else if (pathInfo.equals(&quot;/add&quot;)) {
String name = request.getParameter(&quot;name&quot;);
Integer age = Integer.parseInt(request.getParameter(&quot;age&quot;));
Float score = Float.parseFloat(request.getParameter(&quot;score&quot;));
Student student = new Student();
student.setName(name);
student.setAge(age);
student.setScore(score);
studentDao.save(student);
response.sendRedirect(request.getContextPath() + &quot;/student/&quot;);
} else if (pathInfo.matches(&quot;/\\d+&quot;)) {
Long id = Long.parseLong(pathInfo.substring(1));
Student student = studentDao.findById(id);
if (student != null) {
String name = request.getParameter(&quot;name&quot;);
Integer age = Integer.parseInt(request.getParameter(&quot;age&quot;));
Float score = Float.parseFloat(request.getParameter(&quot;score&quot;));
student.setName(name);
student.setAge(age);
student.setScore(score);
studentDao.update(student);
response.sendRedirect(request.getContextPath() + &quot;/student/&quot;);
} else {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
} else {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
}
}

@Override
protected void doDelete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String pathInfo = request.getPathInfo();
if (pathInfo == null || pathInfo.equals(&quot;/&quot;)) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
} else if (pathInfo.matches(&quot;/\\d+&quot;)) {
Long id = Long.parseLong(pathInfo.substring(1));
Student student = studentDao.findById(id);
if (student != null) {
studentDao.delete(student);
response.setStatus(HttpServletResponse.SC_NO_CONTENT);
} else {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
} else {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
}
}
}
</code></pre>
<p>list.jsp（学生列表页面）</p>
<p>```html
&lt;%@ page contentType=&quot;text/html;charset=UTF-8&quot; language=&quot;java&quot; %&gt;</p>
<html>
<head>
<title>学生管理</title>
</head>
<body>
<h1>学生管理</h1>
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>