Android中的SQLite数据库错误：没有这样的列：标题

Question

运行我的应用时出现此错误：

  

01-09 17：44：29.317：E / AndroidRuntime（3697）：引起：android.database.sqlite.SQLiteException：没有这样的列：title :,编译时：SELECT title，_id FROM Kwl

我已经查找了其他解决方案，但它们都归因于我所缺少的“_id”列。

以下是我的活动中的相关摘录：

final DatabaseHelper db = new DatabaseHelper(this);
Cursor c = db.getKwlNames();
startManagingCursor(c);

String[] from = new String[] { DatabaseHelper.KWL_TITLE, DatabaseHelper.KWL_ID };
int[] to = new int[] { R.id.titleLI_title, R.id.titleLI_id };
SimpleCursorAdapter sca = new SimpleCursorAdapter(this,
        R.layout.title_list_item, c, from, to);
listView.setAdapter(sca);

和我的DatabaseHelper中的代码：

public class DatabaseHelper extends SQLiteOpenHelper {

public static final String DATABASE_NAME = "KWL_DB";
public static final String KWL_TABLE = "Kwl";
public static final String CHART_TABLE = "Chart";
public static final int DATABASE_VERSION = 1;

public static final String KWL_TITLE = "title";
public static final String KWL_ORDER = "seq";
public static final String KWL_HASE = "hase";
public static final String KWL_ID = "_id";

public static final String CHART_TYPE = "type";
public static final String CHART_ORDER = "seq";
public static final String CHART_VALUE = "val";
public static final String CHART_KWL_TITLE = "title";

static final String CREATE_KWL = "CREATE TABLE " + KWL_TABLE + " (" + KWL_ID
        + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KWL_TITLE
        + " TEXT, " + KWL_ORDER + " INTEGER, " + KWL_HASE
        + " INTEGER)";

static final String CREATE_CHART = "CREATE TABLE " + CHART_TABLE + " (" + CHART_KWL_TITLE
        + " TEXT, " + CHART_VALUE + " TEXT, " + CHART_ORDER
        + " INTEGER, " + CHART_TYPE + " TEXT)";

public DatabaseHelper(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {

    db.execSQL(CREATE_KWL); 
    db.execSQL(CREATE_CHART);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}

public Cursor getKwlNames() {
    SQLiteDatabase db = this.getReadableDatabase();
    return db.rawQuery("SELECT " + KWL_TITLE + " , " + KWL_ID + " FROM " + KWL_TABLE, null);
}
}