SQLiteLog 错误没有这样的表：

【问题标题】：SQLiteLog error no such table:SQLiteLog 错误没有这样的表：
【发布时间】：2014-06-02 00:30:21
【问题描述】：

所以我创建了一个数据库，由于下面的错误，我做错了，但我不确定是什么导致了错误。我知道它在我的 DATABASE_CREATE 变量中，但我不知道我的格式不正确。任何帮助，将不胜感激。这是我的错误

06-01 19:41:11.943: E/SQLiteLog(15521): (1) no such table: YCDB
06-01 19:41:11.948: E/SQLiteDatabase(15521): Error inserting users=john password=mavsman
06-01 19:41:11.948: E/SQLiteDatabase(15521): android.database.sqlite.SQLiteException: no such table: YCDB (code 1): , while compiling: INSERT INTO YCDB(users,password) VALUES (?,?)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1118)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:691)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1589)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1461)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at yc.android.yourchallenger.DBAdapter.insertContact(DBAdapter.java:81)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at yc.android.yourchallenger.MainActivity.onCreate(MainActivity.java:27)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.Activity.performCreate(Activity.java:5372)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2362)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.ActivityThread.access$700(ActivityThread.java:168)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1329)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.os.Looper.loop(Looper.java:137)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at android.app.ActivityThread.main(ActivityThread.java:5493)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at java.lang.reflect.Method.invokeNative(Native Method)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at java.lang.reflect.Method.invoke(Method.java:525)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1209)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1025)
06-01 19:41:11.948: E/SQLiteDatabase(15521):    at dalvik.system.NativeStart.main(Native Method)
06-01 19:41:12.188: D/libEGL(15521): loaded /system/lib/egl/libEGL_mali.so
06-01 19:41:12.193: D/libEGL(15521): loaded /system/lib/egl/libGLESv1_CM_mali.so
06-01 19:41:12.203: D/libEGL(15521): loaded /system/lib/egl/libGLESv2_mali.so
06-01 19:41:12.218: E/(15521): Device driver API match
06-01 19:41:12.218: E/(15521): Device driver API version: 23
06-01 19:41:12.218: E/(15521): User space API version: 23 
06-01 19:41:12.218: E/(15521): mali: REVISION=Linux-r3p2-01rel3 BUILD_DATE=Wed Oct  9 21:05:57 KST 2013 
06-01 19:41:12.473: D/OpenGLRenderer(15521): Enabling debug mode 0

这里是数据库类 包 yc.android.yourchallenge;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DBAdapter {
static final String KEY_ROWID = "id";
static final String KEY_USER = "user";
static final String KEY_PASSWORD = "password";
static final String TAG = "DBAdapter";

static final String DATABASE_NAME = "YCDB";
static final String KEY_NAME = "users";
static final int DATABASE_VERSION = 1;

static final String DATABASE_CREATE = 
        "create table contact " + KEY_USER + KEY_PASSWORD;

final Context context;

DatabaseHelper DBHelper;
SQLiteDatabase db;

public DBAdapter (Context ctx)
{
    this.context = ctx;
    DBHelper = new DatabaseHelper(context);
}

private static class DatabaseHelper extends SQLiteOpenHelper
{
    DatabaseHelper(Context context)
    {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        try {
            db.execSQL(DATABASE_CREATE);
        }
        catch(SQLException e){
            e.printStackTrace();
        }
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w(TAG, "Upgrading database from version " + oldVersion + " to " + 
                newVersion + ", which will " +
                "destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS contacts");
        onCreate(db);           
    }
}

    //opens db database
    public DBAdapter open() throws SQLException
    {
        db = DBHelper.getWritableDatabase();
        return null;            
    }

    //closes the database
    public void close()
    {
        DBHelper.close();
    }

    //insert contacts
    public long insertContact(String user, String password )
    {
        ContentValues initialValues = new ContentValues();
        initialValues.put(KEY_NAME, user);
        initialValues.put(KEY_PASSWORD, password);
        return db.insert(DATABASE_NAME, null, initialValues);
    }

    //deletes contact
    /*public boolean deleteContact(long rowId)
    {
        return db.delete(DATABASE_NAME, KEY_ROWID + "+" + rowId, null) > 0;
    }

    //retrieve contacts
    public Cursor getAllContacts()
    {
        return db.query(DATABASE_NAME, new String[]{KEY_ROWID, KEY_NAME,
                KEY_PASSWORD}, null, null, null, null, null);
    }

    //retrieve specified contact
    public Cursor getContact(long rowId) throws SQLException
    {
        Cursor mCursor =
                db.query(true, DATABASE_NAME, new String[] {KEY_ROWID,
                KEY_NAME, KEY_PASSWORD}, KEY_ROWID + "=" + rowId, null,
                null, null, null, null);
        if(mCursor!= null){
            mCursor.moveToFirst();
        }
        return mCursor;
    }

    public Boolean updatContact(long rowId, String user, String password)
    {
        ContentValues args = new ContentValues();
        args.put(KEY_USER, user);
        args.put(KEY_PASSWORD, password);
        return db.update(DATABASE_NAME, args, KEY_ROWID + "=" + rowId, null) > 0;
    }*/
}

这是我的 MainActivity，以防万一 包 yc.android.yourchallenge;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity
{
    @Override 
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button insert = (Button) findViewById(R.id.insert_contact);

    final String john = "john";
    final String pass = "mavsman";

    final DBAdapter db = new DBAdapter(this);
    db.open();
    if(db.open() == null)
    {
        Toast.makeText(this, "database not open", Toast.LENGTH_LONG).show();
    }
    db.insertContact(john, pass);
    db.close();
    insert.setOnClickListener(new View.OnClickListener() 
    {       
        @Override
        public void onClick(View arg0)
        {

        }

    }); 
}
};

【问题讨论】：

标签： java android sqlite


【解决方案1】：

正如 Code-Guru 指出的那样，您将数据插入到 WRONG 表中。

但永远不会创建 CORRECT 表：

此声明：

static final String DATABASE_CREATE = "create table contact " + KEY_USER + KEY_PASSWORD;

会产生错误的命令

"create table contact userpassword"

这将创建表失败。

你需要写：

static final String DATABASE_CREATE = "create table contact (" + KEY_USER + " TEXT, " + KEY_PASSWORD + " TEXT)";

这将产生 right 命令：

"create table contact (user TEXT, password TEXT)"

【讨论】：

    【解决方案2】： 
    static final String DATABASE_CREATE = 
    "create table contact " + KEY_USER + KEY_PASSWORD;

    执行时，这将创建一个名为“contact”的表，但您正在尝试插入一个名为“YCDB”的表。后者是 数据库 的名称，它与该数据库中的表名非常不同。我建议您创建一个 TABLE_NAME 变量以在适当的时候使用。

    【讨论】：

    • 很奇怪。如果我将 DATABASE_NAME 设置为除“YCDB”之外的任何内容，它可以工作，但我现在收到错误“表没有名为用户的列”
    • 我现在看到错误是因为我忘记添加用户列。有道理
    猜你喜欢
    • 2014-02-23
    • 1970-01-01
    • 2018-11-12
    • 1970-01-01
    • 1970-01-01
    • 2015-12-15
    • 2012-08-19
    • 1970-01-01
    • 2023-03-08
    相关资源
    最近更新 更多
    热门标签
    Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode