Android多人sql數據庫錯誤

Question

嗨，朋友。我試圖將一些數據存儲到一個2表數據庫中。下面是它的定義：

public class SQLManager { 

public static String KEY_ROWID = "_id"; 
public static final String KEY_PRODUCT = "product"; 
public static final String KEY_QUANTITY = "quantity"; 
public static final String KEY_PRICE = "price"; 

public static final String KEY_DATA = "user data"; 

private static final String DATABASE_NAME = "PedidoDc"; 
private static final String DATABASE_TABLE1 = "PedidoTable"; 
private static final String DATABASE_TABLE2 = "DatosTable"; 

private static final int DATABASE_VERSION = 1; 

private DbHelper ourHelper; 
private final Context ourContext; 
private SQLiteDatabase ourDatabase; 

private static class DbHelper extends SQLiteOpenHelper{ 

    public DbHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     // TODO Auto-generated method stub 
     db.execSQL("CREATE TABLE " + DATABASE_TABLE1 + " (" + 
       KEY_ROWID + " INTEGER PRIMARY KEY, " + 
       KEY_PRODUCT + " TEXT NOT NULL, " + 
       KEY_QUANTITY + " TEXT NOT NULL, " + 
       KEY_PRICE + " TEXT NOT NULL);" 

     ); 

     db.execSQL("CREATE TABLE " + DATABASE_TABLE2 + " (" + 
       KEY_ROWID + " INTEGER PRIMARY KEY, " + 
       KEY_DATA + " TEXT NOT NULL);" 

     ); 

    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     // TODO Auto-generated method stub 
     db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE1); 
     db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE2); 
     onCreate(db); 

    } 


} 

public SQLManager(Context c){ 

    ourContext = c; 

} 

public SQLManager open() throws SQLException{ 

    ourHelper = new DbHelper(ourContext); 
    ourDatabase = ourHelper.getWritableDatabase(); 
    return this; 
} 

    public void close(){ 

    ourHelper.close(); 

} 

    public long createEntry(String product, String quantity, String price) { 
// TODO Auto-generated method stub 
ContentValues cv = new ContentValues(); 
cv.put(KEY_PRODUCT, product); 
cv.put(KEY_QUANTITY, quantity); 
cv.put(KEY_PRICE, price); 

return ourDatabase.insert(DATABASE_TABLE1, null, cv); 
    } 

    public long createEntry2(String data) { 
// TODO Auto-generated method stub 
ContentValues cv = new ContentValues(); 
cv.put(KEY_DATA, data); 
return ourDatabase.insert(DATABASE_TABLE2, null, cv); 
    } 



    public String getData() { 
// TODO Auto-generated method stub 
String[] columns = new String[]{ KEY_ROWID, KEY_PRODUCT, KEY_QUANTITY, KEY_PRICE}; 
Cursor c = ourDatabase.query(DATABASE_TABLE1, columns, null, null, null, null, null); 
String result = ""; 

int iRow = c.getColumnIndex(KEY_ROWID); 
int iProduct = c.getColumnIndex(KEY_PRODUCT); 
int iQuantity = c.getColumnIndex(KEY_QUANTITY); 
int iPrice = c.getColumnIndex(KEY_PRICE); 

for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 
    result = result + " " + c.getString(iQuantity) + " " + c.getString(iProduct) + "      " + c.getString(iPrice) + "\n"; 
} 

return result; 
    } 

    public String getUserData() { 
// TODO Auto-generated method stub 
String[] columns = new String[]{ KEY_ROWID, KEY_DATA}; 
Cursor c = ourDatabase.query(DATABASE_TABLE2, columns, null, null, null, null, null); 
String result = ""; 

int iRow = c.getColumnIndex(KEY_ROWID); 
int iData = c.getColumnIndex(KEY_DATA); 

for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 
    result = result + " " + c.getString(iData) + "\n"; 
} 

return result; 
    } 
    public void deleteEntry(long l) { 
// TODO Auto-generated method stub 

ourDatabase.delete(DATABASE_TABLE1, null, null); 


    } 

    public String getQuantity(long l) { 
// TODO Auto-generated method stub 
String[] columns = new String[]{KEY_ROWID, KEY_QUANTITY, KEY_PRODUCT ,KEY_PRICE}; 
Cursor c = ourDatabase.query(DATABASE_TABLE1, columns, KEY_ROWID + "=" + l, null, null, null, null); 
if (c != null){ 
    c.moveToFirst(); 
    String quantity = c.getString(1); 
    c.close(); 
    return quantity; 



} 
return null; 
    } 

    public String getProduct(long l) { 
// TODO Auto-generated method stub 
String[] columns = new String[]{KEY_ROWID, KEY_QUANTITY, KEY_PRODUCT ,KEY_PRICE}; 
Cursor c = ourDatabase.query(DATABASE_TABLE1, columns, KEY_ROWID + "=" + l, null, null, null, null); 
if (c != null){ 
    c.moveToFirst(); 
    String product = c.getString(2); 
    c.close(); 
    return product; 
} 
return null; 

    } 

    public String getPrice(long l) { 
// TODO Auto-generated method stub 

String[] columns = new String[]{KEY_ROWID, KEY_QUANTITY, KEY_PRODUCT ,KEY_PRICE}; 
Cursor c = ourDatabase.query(DATABASE_TABLE1, columns, KEY_ROWID + "=" + l, null, null, null, null); 
if (c != null){ 
    c.moveToFirst(); 
    String price = c.getString(3); 
    c.close(); 
    return price; 
} 
return null; 
    } 


    } 

這是我使用的一些數據存儲到第二個表的代碼：

  SQLManager entry = new SQLManager(ConfirmaData.this); 
      entry.open(); 
      entry.createEntry2(tlf); 
      entry.close(); 

當TLF是一個字符串變量。

我得到這個錯誤：

E /數據庫（27790）：android.database.sqlite.SQLiteException：近 「數據」：語法錯誤：，在編譯：INSERT INTO DatosTable（用戶數據）VALUES（ ？）;

有什麼想法？

謝謝！

Answer 1

我認爲錯誤是由於含列名空間

public static final String KEY_DATA = "user data"; 

除去空間和data

Answer 2

我沒有太多的SQL經驗，但你有沒有嘗試設置ID AUTOINCREMENT？既然你不手動添加它？

Answer 3

您不在'createEntry2'方法中指定KEY_ROWID。

，您可以撥打KEY_ROWID爲自動增量值

db.execSQL("CREATE TABLE " + DATABASE_TABLE2 + " (" + 
    KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + 
    KEY_DATA + " TEXT NOT NULL);" 
)