SQLiteException: table already exists

问题:

I added to my DB the table called "MEDIA_TABLE" and i got the following error code:

05-15 20:56:22.976: E/AndroidRuntime(5968): android.database.sqlite.SQLiteException: table personal_stats already exists (code 1): , while compiling: CREATE TABLE personal_stats (_id INTEGER PRIMARY KEY AUTOINCREMENT, pictures TEXT, videos TEXT); 

My second table works fine.

i tried to uninstall my app and install it and it wont work, maybe there is a limit of tables in DB?

Here is my onCreate code:

@Override public void onCreate(SQLiteDatabase db) {     db.execSQL("CREATE TABLE " + TABLE_NAME + " (" +             COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +             COLUMN_DATE + " TEXT, " +             COLUMN_EXERCISE + " TEXT, " +             COLUMN_WEIGHT + " TEXT, " +             COLUMN_REPS + " TEXT, " +             COLUMN_SET_TIME + " TEXT, " +             COLUMN_WORKOUT_TIME + " TEXT, " +             COLUMN_DISTANCE + " TEXT, " +             COLUMN_SPEED + " TEXT, " +             COLUMN_REST_TIME + " TEXT, " +             COLUMN_NUMBER_OF_SETS + " TEXT, " +             COLUMN_FIELDS_PARAMETER + " TEXT, " +             COLUMN_NOT_ON_LIST_EXERCISE + " TEXT, " +             COLUMN_HERAT_BEAT + " TEXT, " +             COLUMN_CALORIES + " TEXT, " +             COLUMN_COMMENT + " TEXT);");      db.execSQL("CREATE TABLE " + SECOND_TABLE_NAME + " (" +             COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +             COLUMN_AGE + " TEXT, " +             COLUMN_AGE_PW + " TEXT, " +             COLUMN_GENDER + " TEXT, " +             COLUMN_HEIGHT + " TEXT, " +             COLUMN_HEIGHT_PW + " TEXT, " +             COLUMN_BODY_WEIGHT + " TEXT, " +             COLUMN_BODY_WEIGHT_PW + " TEXT, " +             COLUMN_PROFILE_PIC + " TEXT, " +             COLUMN_FAT + " TEXT, " +             COLUMN_FAT_PW + " TEXT);");      db.execSQL("CREATE TABLE " +  MEDIA_TABLE + " (" +             COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +             COLUMN_PICS + " TEXT, " +             COLUMN_VIDEO + " TEXT);");  }         @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);     db.execSQL("DROP TABLE IF EXISTS " + SECOND_TABLE_NAME);     db.execSQL("DROP TABLE IF EXISTS " + MEDIA_TABLE);     onCreate(db);    }  EDIT : @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {     db.execSQL("CREATE TABLE IF NOT EXISTS" + TABLE_NAME);     db.execSQL("CREATE TABLE IF NOT EXISTS" + SECOND_TABLE_NAME);     db.execSQL("CREATE TABLE IF NOT EXISTS" + MEDIA_TABLE);     onCreate(db);    } 

回答1:

You should use CREATE TABLE IF NOT EXISTS instead of CREATE TABLE. Your code would then look like this:

@Override public void onCreate(SQLiteDatabase db) {     db.execSQL("CREATE TABLE IF NOT EXISTS" + TABLE_NAME + " (" +             COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +             COLUMN_DATE + " TEXT, " +             COLUMN_EXERCISE + " TEXT, " +             COLUMN_WEIGHT + " TEXT, " +             COLUMN_REPS + " TEXT, " +             COLUMN_SET_TIME + " TEXT, " +             COLUMN_WORKOUT_TIME + " TEXT, " +             COLUMN_DISTANCE + " TEXT, " +             COLUMN_SPEED + " TEXT, " +             COLUMN_REST_TIME + " TEXT, " +             COLUMN_NUMBER_OF_SETS + " TEXT, " +             COLUMN_FIELDS_PARAMETER + " TEXT, " +             COLUMN_NOT_ON_LIST_EXERCISE + " TEXT, " +             COLUMN_HERAT_BEAT + " TEXT, " +             COLUMN_CALORIES + " TEXT, " +             COLUMN_COMMENT + " TEXT);");      db.execSQL("CREATE TABLE IF NOT EXISTS" + SECOND_TABLE_NAME + " (" +             COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +             COLUMN_AGE + " TEXT, " +             COLUMN_AGE_PW + " TEXT, " +             COLUMN_GENDER + " TEXT, " +             COLUMN_HEIGHT + " TEXT, " +             COLUMN_HEIGHT_PW + " TEXT, " +             COLUMN_BODY_WEIGHT + " TEXT, " +             COLUMN_BODY_WEIGHT_PW + " TEXT, " +             COLUMN_PROFILE_PIC + " TEXT, " +             COLUMN_FAT + " TEXT, " +             COLUMN_FAT_PW + " TEXT);");      db.execSQL("CREATE TABLE IF NOT EXISTS" +  MEDIA_TABLE + " (" +             COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +             COLUMN_PICS + " TEXT, " +             COLUMN_VIDEO + " TEXT);");  }         @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);     db.execSQL("DROP TABLE IF EXISTS " + SECOND_TABLE_NAME);     db.execSQL("DROP TABLE IF EXISTS " + MEDIA_TABLE);     onCreate(db);    } 

回答2:

use this way

db.execSQL("create table if not exists table_name(rank int, correct_answer int, optionselect int);"; 

文章来源: SQLiteException: table already exists