Question

我只想将表从table1复制到同一数据库中的table2。我四处闲逛，但我遇到了一些错误。这是我的源代码：

我点了这个链接：Copy table

public class SelectedCandidatesDB {

public static final String KEY_NAME1 = "name1";
public static final String KEY_NAME2 = "name2";
public static final String KEY_NAME3 = "name3";
public static final String KEY_NAME4 = "name4";
public static final String KEY_NAME5 = "name5";
public static final String KEY_ID = "_id";
private final Context mCtx;
private static final String TAG = "CountriesDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;

// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "selectedcandidates.db";
// Contacts table name
private static final String TABLE_SELECTED_CAND = "selectedcandids";
private static final String TABLE_RECOUNT1 = "rec1";
private static final String TABLE_RECOUNT2 = "recountedsecond";
private static final String TABLE_RECOUNT3 = "recountedthird";

private static final String CREATE_SELECTED_CAND_TABLE = " CREATE TABLE if not exists "
        + TABLE_SELECTED_CAND
        + "("
        + KEY_ID
        + " integer PRIMARY KEY autoincrement,"
        + KEY_NAME1
        + " TEXT,"
        + KEY_NAME2
        + " TEXT,"
        + KEY_NAME3
        + " TEXT,"
        + KEY_NAME4
        + " TEXT," + KEY_NAME5 + " TEXT" + ")";

private static final String CREATE_SELECTED_CAND_RECOUNT1 = " CREATE TABLE if not exists "
        + TABLE_RECOUNT1
        + "("
        + KEY_ID
        + " integer PRIMARY KEY autoincrement,"
        + KEY_NAME1
        + " TEXT,"
        + KEY_NAME2
        + " TEXT,"
        + KEY_NAME3
        + " TEXT,"
        + KEY_NAME4
        + " TEXT," + KEY_NAME5 + " TEXT" + ")";
private static final String CREATE_SELECTED_CAND_RECOUNT2 = " CREATE TABLE if not exists "
        + TABLE_RECOUNT2
        + "("
        + KEY_ID
        + " integer PRIMARY KEY autoincrement,"
        + KEY_NAME1
        + " TEXT,"
        + KEY_NAME2
        + " TEXT,"
        + KEY_NAME3
        + " TEXT,"
        + KEY_NAME4
        + " TEXT," + KEY_NAME5 + " TEXT" + ")";
private static final String CREATE_SELECTED_CAND_RECOUNT3 = " CREATE TABLE if not exists "
        + TABLE_RECOUNT3
        + "("
        + KEY_ID
        + " integer PRIMARY KEY autoincrement,"
        + KEY_NAME1
        + " TEXT,"
        + KEY_NAME2
        + " TEXT,"
        + KEY_NAME3
        + " TEXT,"
        + KEY_NAME4
        + " TEXT," + KEY_NAME5 + " TEXT" + ")";

private static class DatabaseHelper extends SQLiteOpenHelper {

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

    @Override
    public void onCreate(SQLiteDatabase db) {

        db.execSQL(CREATE_SELECTED_CAND_RECOUNT1);
        db.execSQL(CREATE_SELECTED_CAND_TABLE);

        Log.d("Selected Candidate DB ",
                "The Table recount 1 has been created :");
        db.execSQL(CREATE_SELECTED_CAND_RECOUNT2);
        db.execSQL(CREATE_SELECTED_CAND_RECOUNT3);
    }

    @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 " + CREATE_SELECTED_CAND_RECOUNT1);
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_SELECTED_CAND);

        db.execSQL("DROP TABLE IF EXISTS " + CREATE_SELECTED_CAND_RECOUNT2);
        db.execSQL("DROP TABLE IF EXISTS " + CREATE_SELECTED_CAND_RECOUNT3);
        onCreate(db);
    }
}

public SelectedCandidatesDB(Context ctx) {
    this.mCtx = ctx;
}

public SelectedCandidatesDB open() throws SQLException {
    mDbHelper = new DatabaseHelper(mCtx);
    mDb = mDbHelper.getWritableDatabase();
    return this;
}

public void close() {
    if (mDbHelper != null) {
        mDbHelper.close();
    }
}


  // ************** 


    public void copyToRecount1() {

    mDb.execSQL(" INSERT INTO " + TABLE_RECOUNT1 + " SELECT * FROM "
            + TABLE_SELECTED_CAND);
}

并且日志是：

   I/SqliteDatabaseCpp(12637): sqlite returned: error code = 1, msg = no
   such table: rec1, db=xxx   D/AndroidRuntime(12637): Shutting down VM 
   threadid=1: thread exiting with uncaught exception (group=0x40c501f8)
   E/AndroidRuntime(12637):

   FATAL EXCEPTION: main 
   E/AndroidRuntime(12637): android.database.sqlite.SQLiteException: ***no such table: rec1: , while compiling: INSERT INTO rec1 SELECT * FROM selectedcandids***   
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)   
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68)
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143)
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:260)
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84)
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:2028)
   E/AndroidRuntime(12637):     at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1968)
   E/AndroidRuntime(12637):     at com.dana.db.SelectedCandidatesDB.copyToRecount1(SelectedCandidatesDB.java:264)
   E/AndroidRuntime(12637):     at com.dana.votecount.VoteRecount$2$1.onClick(VoteRecount.java:91)
   E/AndroidRuntime(12637):     at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:167)

Answer 1

错误说你没有表'rec1'。也许您在创建数据库之后添加了此表。卸载您的应用程序并再次运行。它将再次创建数据库和所有表。

如何将所有记录从一个表复制到android Sqlite中同一个数据库中的另一个表

1 个答案: