Question

我正在尝试向我的sqlite数据库添加一个新列。我以前添加了一个额外的列（电子邮件），并没有任何问题。下面是我创建的DbHelper类。

public class DbHelper extends SQLiteOpenHelper {
public static String DATABASE_NAME="userdata";
public static final String TABLE_NAME="user";
public static final String KEY_FNAME="fname";
public static final String KEY_LNAME="lname";
public static final String KEY_EMAIL="email";
public static final String KEY_CHECK="check";
public static final String KEY_ID="id";
public DbHelper(Context context) {
    super(context, DATABASE_NAME, null, 1);

}

@Override
public void onCreate(SQLiteDatabase db) {
    String CREATE_TABLE="CREATE TABLE " +TABLE_NAME+" ("+KEY_ID+" INTEGER PRIMARY KEY, "+KEY_FNAME+" TEXT, "+KEY_LNAME+" TEXT, "+KEY_CHECK+" TEXT)";
    db.execSQL(CREATE_TABLE);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
    onCreate(db);

}

}

创建数据库时，它将从我的主要活动中显示：

private void displayData() {
    dataBase = mHelper.getWritableDatabase();
    Cursor mCursor = dataBase.rawQuery("SELECT * FROM "
            + DbHelper.TABLE_NAME, null);

    userId.clear();
    user_fName.clear();
    user_lName.clear();
    user_eMail.clear();
    user_cHeck.clear();
    if (mCursor.moveToFirst()) {
        do {
            userId.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_ID)));
            user_fName.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_FNAME)));
            user_lName.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_LNAME)));
            user_eMail.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_EMAIL)));
            user_cHeck.add(mCursor.getString(mCursor.getColumnIndex(DbHelper.KEY_CHECK)));

        } while (mCursor.moveToNext());
    }
    DisplayAdapter disadpt = new DisplayAdapter(getActivity(),userId, user_fName, user_lName, user_eMail, user_cHeck);
    userList.setAdapter(disadpt);
    mCursor.close();
}
{

}

在创建时，我收到以下错误：

04-09 15:33:16.740: E/SQLiteLog(19806): (1) near "TEXT": syntax error
04-09 15:33:16.755: W/dalvikvm(19806): threadid=1: thread exiting with uncaught exception (group=0x40df4a08)
04-09 15:33:16.765: E/AndroidRuntime(19806): FATAL EXCEPTION: main
04-09 15:33:16.765: E/AndroidRuntime(19806): android.database.sqlite.SQLiteException: near "TEXT": syntax error (code 1): , while compiling: CREATE TABLE user (id INTEGER PRIMARY KEY, fname TEXT, lname TEXT, check TEXT)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:909)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:520)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1719)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1650)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at app.norman.tennis.fours.DbHelper.onCreate(DbHelper.java:23)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at app.norman.tennis.FoursFragment.displayData(FoursFragment.java:244)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at app.norman.tennis.FoursFragment.onResume(FoursFragment.java:235)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.Fragment.performResume(Fragment.java:1828)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:921)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1059)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.BackStackRecord.run(BackStackRecord.java:682)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1437)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.os.Handler.handleCallback(Handler.java:725)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.os.Handler.dispatchMessage(Handler.java:92)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.os.Looper.loop(Looper.java:158)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at android.app.ActivityThread.main(ActivityThread.java:5751)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at java.lang.reflect.Method.invokeNative(Native Method)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at java.lang.reflect.Method.invoke(Method.java:511)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850)
04-09 15:33:16.765: E/AndroidRuntime(19806):    at dalvik.system.NativeStart.main(Native Method)

任何人都可以帮助我理解为什么我遇到这个问题。提前谢谢。

Answer 1

check是SQL中的保留字。重命名列或在` `反引号中引用它。

Answer 2

CHECK是SQLite中的保留字。请为此列选择其他名称。在创建其他语句时，它会为您节省很多麻烦。

link

创建sqlite数据库时出错 - Android

2 个答案: