Android table creation Failure (near "autoincrement": syntax error)?

Question

 public static final String MYDATABASE_NAME = "MY_DATABASE";
 public static final String MYDATABASE_TABLE = "MY_TABLE";
 public static final String MYDATABASE_TABLE2 = "MY_TABLE2";
 public static final int MYDATABASE_VERSION = 1;
 public static final String KEY_ID = "_id";
 public static final String KEY_ID2 = "_id2";
 public static final String KEY_CONTENT1 = "Content1";
 public static final String KEY_CONTENT2 = "Content2";
 public static final String KEY_CONTENT3 = "Content3";

 //create table MY_DATABASE (ID integer primary key, Content text not null);
 private static final String SCRIPT_CREATE_DATABASE = "create table " + MYDATABASE_TABLE + " (" 
                                                        +KEY_ID + " integer primary key autoincrement, " 
                                                        + KEY_CONTENT1 + " text not null);";

 private static final String SCRIPT_CREATE_DATABASE2 = "create table " + MYDATABASE_TABLE2 + " (" 
                                                        + KEY_ID2 + " integer autoincrement, " 
                                                        + KEY_CONTENT2 + " text not null, " 
                                                        + KEY_CONTENT3 + " text not null, "
                                                        + " FOREIGN KEY ("+KEY_ID2+") REFERENCES "+MYDATABASE_TABLE+" ("+KEY_ID+"));";

I can not find out what gives the following error, please help me out thank you.

09-29 13:41:19.760: ERROR/Database(334): Failure 1 (near "autoincrement": syntax error) on 0x218df0 when preparing 'create table MY_TABLE2 (_id2 integer autoincrement, Content2 text not null, Content3 text not null, FOREIGN KEY (_id2) REFERENCES MY_TABLE (_id));'.

09-29 13:41:19.770: DEBUG/AndroidRuntime(334): Shutting down VM

09-29 13:41:19.770: WARN/dalvikvm(334): threadid=1: thread exiting with uncaught exception (group=0x4001d800)

09-29 13:41:19.791: ERROR/AndroidRuntime(334): FATAL EXCEPTION: main

09-29 13:41:19.791: ERROR/AndroidRuntime(334): java.lang.RuntimeException: Unable to start activity ComponentInfo{sep.com/sep.com.SepActivity}: android.database.sqlite.SQLiteException: near "autoincrement": syntax error: create table MY_TABLE2 (_id2 integer autoincrement, Content2 text not null, Content3 text not null, FOREIGN KEY (_id2) REFERENCES MY_TABLE (_id));

Answer 1

In short: In SQLite a column declared INTEGER PRIMARY KEY will autoincrement. There is no autoincrement keyword in SQLite, that is why you are getting an error.

You can find out more on SQLite FAQ.

EDIT: just writing integer primary key it is enough. SQLite will automatically increment your ids.

EDIT2: Your onUpgrade() method should look like this :

  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        if (newVersion > oldVersion) {
            Log.w("MyAppTag","Updating database from version " + oldVersion + " to "
                    + newVersion + " .Existing data will be lost.");
            db.execSQL("DROP TABLE IF EXISTS " + MY_TABLE);
            db.execSQL("DROP TABLE IF EXISTS " + MY_TABLE2);
            onCreate(db);
        }