表 * 没有名为 ** 的列答案

【问题标题】：Table * has no column named **表 * 没有名为 ** 的列
【发布时间】：2021-01-06 03:16:41
【问题描述】：

我正在尝试学习 SQLite，尝试基本的东西，但（正如预期的那样）它并没有真正起作用。我试图创建另一个数据库（不同的文件），但错误仍然存在。请指导我。我是 Android 新手，所以我没有太多知识。

package net.multiplesystem.nosms.database;
import android.content.ContentValues;
import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;

public class RegisterAdapter
{
    static final String DATABASE_NAME = "register.db";
    static final int DATABASE_VERSION = 1;
    public static final int NAME_COLUMN = 1;
    // TODO: Create public field for each column in your table.
    // SQL Statement to create a new database.
    static final String DATABASE_CREATE = "create table "+"REGISTER"+
            "( " +"ID"+" integer primary key autoincrement,"+ "NAME text,"+"NUMBER text); ";
    // Variable to hold the database instanceSTER
    public  SQLiteDatabase db;
    // Context of the application using the database.
    private final Context context;
    // Database open/upgrade helper
    private DataBaseHelper dbHelper;
    public  RegisterAdapter(Context _context)
    {
        context = _context;
        dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION);
    }
    public  RegisterAdapter open() throws SQLException
    {
        db = dbHelper.getWritableDatabase();
        return this;
    }
    public void close()
    {
        db.close();
    }

    public  SQLiteDatabase getDatabaseInstance()
    {
        return db;
    }


    public void insertEntry(String userName,String number)
    {
        ContentValues newValues = new ContentValues();
        // Assign values for each row.
        newValues.put("NUMBER",number);
        newValues.put("NAME", userName);


        // Insert the row into your table
        db.insert("REGISTER", null, newValues);
        ///Toast.makeText(context, "Reminder Is Successfully Saved", Toast.LENGTH_LONG).show();
    }
}

这是我的日志：

01-13 08:55:49.269: E/SQLiteLog(2588): (1) table REGISTER has no column named NAME
01-13 08:55:49.319: E/SQLiteDatabase(2588): Error inserting NAME=hhhh NUMBER=564
01-13 08:55:49.319: E/SQLiteDatabase(2588): android.database.sqlite.SQLiteException: table REGISTER has no column named NAME (code 1): , while compiling: INSERT INTO REGISTER(NAME,NUMBER) VALUES (?,?)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1467)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
01-13 08:55:49.319: E/SQLiteDatabase(2588):     at net.multiplesystem.nosms.database.RegisterAdapter.insertEntry(RegisterAdapter.java:65)

package net.multiplesystem.nosms.database;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DataBaseHelper extends SQLiteOpenHelper
{
    public DataBaseHelper(Context context, String name,CursorFactory factory, int version)
    {
        super(context, name, factory, version);
    }
    // Called when no database exists in disk and the helper class needs
    // to create a new one.
    @Override
    public void onCreate(SQLiteDatabase _db)
    {
        _db.execSQL(RegisterAdapter.DATABASE_CREATE);

    }
    // Called when there is a database version mismatch meaning that the version
    // of the database on disk needs to be upgraded to the current version.
    @Override
    public void onUpgrade(SQLiteDatabase _db, int _oldVersion, int _newVersion)
    {
        // Log the version upgrade.
        Log.w("TaskDBAdapter", "Upgrading from version " +_oldVersion + " to " +_newVersion + ", which will destroy all old data");

        // Upgrade the existing database to conform to the new version. Multiple
        // previous versions can be handled by comparing _oldVersion and _newVersion
        // values.
        // The simplest case is to drop the old table and create a new one.
        _db.execSQL("DROP TABLE IF EXISTS " + "REGISTER");
        // Create a new one.
        onCreate(_db);
    }
}

【问题讨论】：

你真的在某处执行 DATABASE_CREATE 吗？
在另一个活动中是的。
昨天我回答了同样的问题..检查链接stackoverflow.com/questions/21078184/…

标签： java android sqlite android-sqlite

【解决方案1】：

你真的创建了表吗？似乎从未执行过 DATABASE_CREATE 脚本。如果您创建过一次然后更改了语句，请确保通过增加数据库版本再次执行它。

DATABASE_VERSION=1，您是否有没有 NAME 列的先前版本？尝试增加 DATABASE_VERSION（可能添加一些日志记录/断点）并查看数据库是否被重新创建。

【讨论】：

请检查更新后的帖子，我已包含执行 DATABASE_CREATE 脚本的其他活动。

【解决方案2】：

这可能是因为您在添加属性之前迁移了表格文件。我建议你删除你的数据库文件在数据库文件夹中重新创建一个空的数据库文件，然后迁移。并重新运行您的服务器，这应该可以工作。

【讨论】：