java - JDBC——没有足够的值

Question

我有一个 MySQL 表 EMPLOYEES，其形式如下:

CREATE TABLE EMPLOYEES
(
        FNAME           VARCHAR(15)             NOT NULL,
        LNAME           VARCHAR(15)             NOT NULL,
        PHONE           CHAR(10),
        HOURS           INT                     NOT NULL,
        EMPLOYEE_NUM    CHAR(5)                 NOT NULL,
        PRIMARY KEY(EMPLOYEE_NUM)
);

我正在尝试编写一个程序来操作该表。我有以下方法来尝试执行此操作。

void addEmployee(Connection conn) throws SQLException, IOException {

    Statement stmt = conn.createStatement(); 

    String fName = readEntry("First name: ");
    String lName = readEntry("Last name: ");
    String phoneNumber = readEntry("Phone number: ");
    String hours = readEntry("Number of hours worked: ");
    String employeeNum = readEntry("Employee Number: ");
    String query = "INSERT INTO EMPLOYEES VALUES ('" +
            fName + "','" + lName + "','" + phoneNumber + "'," + hours + ",'" + employeeNum + "')";
    try {
      int nrows = stmt.executeUpdate(query);
    } catch (SQLException e) {
        System.out.println("Error Adding Catalog Entry");
        while (e != null) {
          System.out.println("Message     : " + e.getMessage());
          e = e.getNextException();
        }
        return;
      }
    stmt.close();
    System.out.println("Added Catalog Entry");
}

当我尝试执行此调用时:

First name: fname
Last name: lname
Phone number: 
Number of hours worked: 34
Employee Number: 01923
Error Adding Catalog Entry
Message     : ORA-00947: not enough values

在此尝试中，我将“phoneNumber”留空以表示 NULL。在之前的尝试中，我给了它一个电话号码并收到了相同的消息。

有谁知道为什么会这样吗？

如果缺少任何重要信息，请告诉我，我可以添加它。

谢谢， 埃里普

Answer 1

当您执行插入时，您应该始终列出列。

这有效吗？

INSERT INTO EMPLOYEES(fname, lname, phoneNumber, hours, employee_Num)
      VALUES ('" +fName + "','" + lName + "','" + phoneNumber + "'," + hours + ",'" + employeeNum + "')