Verursacht durch: android.database.sqlite.SQLiteException: in der Nähe von "": Syntaxfehler (Code 1):, beim Kompilieren:

Question

 
    11-27 03:32:04.471: E/AndroidRuntime(23137): Caused by: android.database.sqlite.SQLiteException: near "order": syntax error (code 1): , while compiling: create table order (_id integer primary key autoincrement, origin text not null, quantity integer not null);

MyDatabase Klasse:

public class MyDatabase extends SQLiteOpenHelper { 

    public static final String TABLE_NAME = "order"; 
    public static final String TABLE_ID = "_id"; 
    public static final String TABLE_ORIGIN = "origin"; 
    public static final String TABLE_QUANTITY = "quantity"; 
    private static final String DATABASE_NAME = "Appple.db"; 
    private static final int DATABASE_VERSION = 1; 

    private static final String DATABASE_CREATE = 
     "create table " + TABLE_NAME + 
      "(" + TABLE_ID + " integer primary key autoincrement, " + 
      TABLE_ORIGIN + " text not null, " + 
      TABLE_QUANTITY + " integer not null);"; 

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

    public void onCreate(SQLiteDatabase db) { 
     db.execSQL(DATABASE_CREATE); 
    } 

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

Betriebsklasse:

public class Operation { 

    private MyDatabase dbHelper; 
    private String[] COLUMNS = { MyDatabase.TABLE_ID, MyDatabase.TABLE_ORIGIN, MyDatabase.TABLE_QUANTITY }; 
    private SQLiteDatabase database; 


    public Operation(Context context) { 
     dbHelper = new MyDatabase(context); 
    } 

    public void open() throws SQLException { 
     database = dbHelper.getWritableDatabase(); 
    } 

    public void close() { 
     dbHelper.close(); 
    } 

    public void add(String origin, String quantity) { 
     ContentValues values = new ContentValues(); 
     values.put(MyDatabase.TABLE_ORIGIN, origin); 
     values.put(MyDatabase.TABLE_QUANTITY, Integer.parseInt(quantity)); 
     database.insert(MyDatabase.TABLE_NAME, null, values); 
    }  

    public int get(String origin) { 
     int total = 0; 

     Cursor cursor = database.query(MyDatabase.TABLE_NAME, COLUMNS, 
       MyDatabase.TABLE_ORIGIN + " = " + origin, null, null, null, null); 
     cursor.moveToFirst(); 
     while(!cursor.isAfterLast()) { 
      total += cursor.getInt(2); 
      cursor.moveToNext(); 
     } 
     cursor.close(); 
     return total; 
    } 
} 

In MainActivity mit

Operation op; 
op = new Operation(this); 
op.open(); 

denken beginne ich dort ist kein Problem in CREATE TABLE. Aber ich kann keine Fehler finden.

Answer 1

order ist ein Schlüsselwort in SQL. Benennen Sie die Tabelle entweder um, oder fügen Sie den Tabellennamen in Anführungszeichen wie "order" ein.

Answer 2

order ist ein SQLite-Schlüsselwort, und SQLITE-Schlüsselwörter können nicht als Tabellenname verwendet werden. Here können Sie eine Liste dieser