Develop Reference

column '_id' does not exist. Available columns: [_Id, Product]

it keeps telling me column _id doesn't exist and in my whole code I didn't find the word _id
public static final String TABLE_NAME = "LIST";
public static final String _ID = "_Id";
public static final String PRODUCT_NAME = "Product";
static final String DB_NAME = "LIST.DB";
static final int DB_VERSION = 1;
private SQLiteDatabase database;
private static final String CREATE_TABLE = " CREATE TABLE " + TABLE_NAME + "(" + _ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + PRODUCT_NAME + " TEXT NOT NULL );";
final String[] from = new String[]
{DatabaseHelper. _ID , DatabaseHelper. PRODUCT_NAME};
final int[] to = new int[]
{R.id._Id , R.id.Product};
adapter = new SimpleCursorAdapter(this ,R.layout.viewrecord , c , from , to , 0);
listView.setAdapter(adapter);

Running SQLite query in Android

I am new to SQLite queries in android. Trying to run a query. However, app keeps crashing with the following error :
Caused by: java.lang.IllegalStateException: Couldn't read row 1, col
-1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
Below is the extract of Code
public String getOutputData(){
String inputData = "'Vineet'";
Cursor cursorNew = db.rawQuery("SELECT email FROM groupseries INNER JOIN email " +
"ON groupseries.emailid = email._id INNER JOIN user ON " +
"groupseries.userid = user._id WHERE name=" + inputData, null);
cursorNew.moveToFirst ();
StringBuffer buffer = new StringBuffer();
while(cursorNew.moveToNext()){
int index1 = cursorNew.getColumnIndex(DatabaseHelper.KEY_NAME);
int index2 = cursorNew.getColumnIndex(DatabaseHelper.KEY_EMAIL);
String userID = cursorNew.getString(index1);
String emailID = cursorNew.getString(index2);
buffer.append(userID + " " + emailID + "\n");
}
return buffer.toString();
}
Below is the code for table creation I am using. (Open to suggestions to make this less clumsy).
private static final String DATABASE_NAME = "tryDemoDataBase.db";
private static final String TABLE_NAME_USER = "user";
private static final String TABLE_NAME_EMAIL = "email";
private static final String TABLE_NAME_GROUP = "groupseries";
private static final int DATABASE_VERSION = 12;
private static final String KEY_ROWID_USER = "_id";
private static final String KEY_ROWID_EMAIL = "_id";
private static final String KEY_ROWID_GROUP = "_id";
private static final String REFERENCE_USER_ID = "userid";
private static final String REFERENCE_EMAIL_ID = "emailid";
private static final String KEY_NAME="name";
private static final String KEY_EMAIL = "email";
private static final String CREATE_TABLE_USER = "create table "+ TABLE_NAME_USER
+ " ("+ KEY_ROWID_USER+" integer primary key autoincrement, "
+ KEY_NAME + " text)";
private static final String CREATE_TABLE_EMAIL = "create table "+ TABLE_NAME_EMAIL
+ " ("+ KEY_ROWID_EMAIL+" integer primary key autoincrement, "
+ KEY_EMAIL + " text)";
private static final String CREATE_TABLE_GROUP = "create table " + TABLE_NAME_GROUP+ " ("
+ KEY_ROWID_GROUP+" integer primary key autoincrement, "
+ REFERENCE_USER_ID + " integer, " + REFERENCE_EMAIL_ID + " integer)";

First remove this line:
cursorNew.moveToFirst();
because later you use:
while (cursorNew.moveToNext())
so actually you are skipping the 1st (and maybe the only) row of the results.
Then you must include in the selected columns the column name if you want to retrieve it from the Cursor object:
Cursor cursorNew = db.rawQuery("SELECT name, email FROM groupseries INNER JOIN email " +
"ON groupseries.emailid = email._id INNER JOIN user ON " +
"groupseries.userid = user._id WHERE name=" + inputData, null);
And a suggestion to use the recommended and safe way of passing parameters to a query instead of concatenating them directly.
Use ? placeholders:
String inputData = "Vineet"; // no quotes
Cursor cursorNew = db.rawQuery(
"SELECT name, email FROM groupseries INNER JOIN email " +
"ON groupseries.emailid = email._id INNER JOIN user ON " +
"groupseries.userid = user._id WHERE name=?",
new String[] {inputData}
);

Getting error : Caused by: java.lang.ArrayIndexOutOfBoundsException: length=3; index=4

I got error in following code. I am trying to save my traveled distance in SQLite Database but getting error in SQLite Database. I don't know how to manage the array length. I am getting an error called
java.lang.ArrayIndexOutOfBoundsException: length=3; index=4.
public class ActivityLocationDaoImpl extends Dao implements ActivityLocationDao {
private static final String TABLE_NAME = "activity_location";
private static final String COLUMN_ID = "id";
private static final String COLUMN_LATITUDE = "latitude";
private static final String COLUMN_LONGITUDE = "longitude";
private static final String COLUMN_ACTIVITY = "activity";
private static final String COLUMN_DATE = "date";
private static final String[] COLUMN_ARRAY = new String[]{COLUMN_ID, COLUMN_LATITUDE, COLUMN_LONGITUDE, COLUMN_ACTIVITY, COLUMN_DATE};
public static final String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " (\n" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,\n" +
COLUMN_LATITUDE + " INTEGER NOT NULL,\n" +
COLUMN_LONGITUDE + " INTEGER NOT NULL,\n" +
COLUMN_ACTIVITY + " INTEGER NOT NULL,\n" +
COLUMN_DATE + " INTEGER NOT NULL\n" + ")";
public ActivityLocationDaoImpl(SQLiteDatabase database) {
super(database);
}
#Override
public boolean insert(ActivityLocation activityLocation) {
ContentValues contentValues = new ContentValues();
contentValues.put(COLUMN_LATITUDE, activityLocation.getLocation().getLatitude());
contentValues.put(COLUMN_LONGITUDE, activityLocation.getLocation().getLongitude());
contentValues.put(COLUMN_ACTIVITY, activityLocation.getActivityType().getIndex());
contentValues.put(COLUMN_DATE, activityLocation.getDate().getTime());
return getDatabase().insert(TABLE_NAME, null, contentValues) != -1;
}
#Override
public List<ActivityLocation> listAll(Date currentDay) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(currentDay);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
currentDay = calendar.getTime();
calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + 1);
Date nextDay = calendar.getTime();
Cursor cursor = getDatabase().query(TABLE_NAME, COLUMN_ARRAY, COLUMN_DATE + " > ? AND " + COLUMN_DATE + " < ?",
new String[]{String.valueOf(currentDay.getTime()), String.valueOf(nextDay.getTime())},
null, null, COLUMN_DATE + " ASC", null);
List<ActivityLocation> activityLocationList = new ArrayList<>();
while (cursor.moveToNext()) {
activityLocationList.add(convertCursorToEntity(cursor));
}
return activityLocationList;
}
#Override
public List<ActivityLocation> listAll(Date startDate, Date finalDate) {
Cursor cursor = getDatabase().query(TABLE_NAME, COLUMN_ARRAY, COLUMN_DATE + " > ? AND " + COLUMN_DATE + " < ?",
new String[]{String.valueOf(startDate.getTime()), String.valueOf(finalDate.getTime())},
null, null, COLUMN_DATE + " ASC", null);
List<ActivityLocation> activityLocationList = new ArrayList<>();
while (cursor.moveToNext()) {
activityLocationList.add(convertCursorToEntity(cursor));
}
return activityLocationList;
}
public ActivityLocation convertCursorToEntity(Cursor cursor) {
ActivityLocation activityLocation = new ActivityLocation();
Location location = new Location();
activityLocation.setId(cursor.getInt(0));
location.setLatitude(cursor.getDouble(1));
location.setLongitude(cursor.getDouble(2));
activityLocation.setLocation(location);
activityLocation.setActivityType(ActivityType.values()[cursor.getInt(3)]);
activityLocation.setDate(new Date(cursor.getLong(4)));
return activityLocation;
}
Getting Error on this line :
activityLocation.setActivityType(ActivityType.values()[cursor.getInt(3)]);
Thanks in advance.

Most probably, the cursor only contains 3 resulting columns. Therefore you can only access 0, 1 and 2.

Shravan, you can't fetch 4th index value from the array when there are only 3 values.
You can access the index values of 0,1,2 only.
Use breakpoint on the crashing line and you will get a clear picture.

Well, you cant access 4th element of an array having just 3 elements. Mostly people confuse this having a little background in C/C++.
This is the difference in C/C++ and JAVA.
Suppose you have something like this:
int arr[] = {1,2,3};
Now, if you do arr[3] in C/C++, it will return some garbage value, whatever is present at the that particular address, but in JAVA , ArrayIndexOutOfBoundsException is thrown.

How to output SQLite column to ArrayList? [duplicate]

This question already has answers here:
What's the best way to iterate an Android Cursor?
(10 answers)
Closed 6 years ago.
I have an SQLite Database.
Here's some of the code setting it up:
// Field Names:
public static final String KEY_ROWID = "_id";
public static final String KEY_NAME = "name";
public static final String KEY_DESCRIPTION = "description";
public static final String[] ALL_KEYS = new String[] {KEY_ROWID, KEY_NAME, KEY_DESCRIPTION};
// Column Numbers for each Field Name:
public static final int COL_ROWID = 0;
public static final int COL_NAME = 1;
public static final int COL_DESCRIPTION = 2;
// DataBase info:
public static final String DATABASE_NAME = "dbMetrics";
public static final String DATABASE_TABLE = "mainMetrics";
public static final int DATABASE_VERSION = 1;
//SQL statement to create database
private static final String DATABASE_CREATE_SQL =
"CREATE TABLE " + DATABASE_TABLE
+ " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ KEY_NAME + " TEXT NOT NULL, "
+ KEY_DESCRIPTION + " TEXT"
+ ");";
I want to output one of my columns KEY_NAME as an ArrayList.
To do this, I have so far generated the following code:
public ArrayList<String> getAllStringValues() {
ArrayList<String> myStringValues = new ArrayList<String>();
Cursor result = db.query(true, DATABASE_TABLE,
new String[] {KEY_NAME}, null, null, null, null,
null, null);
**********CODE NEEDED HERE***********
System.out.println(Arrays.toString(myStringValues.toArray()));
return myStringValues ;
}
However, I am not sure how I get the data from the column into an ArrayList from here.
My Question
Can someone give me some assistance as to how to design a loop that will go through each row in the column and put that data in an ArrayList?
I'm pretty sure I will need to at some point use
result.getString(result.getColumnIndex(KEY_NAME))
in order to do this, but again, I'm not sure how.
Any help would be greatly appreciated.

if (Cursor.moveToFirst()) {
do {
keyname.add(Cursor.getString(Cursor.getColumnIndex("keyname")));
key_description.add(Cursor.getString(Cursor.getColumnIndex("key_description")));
} while (Cursor.moveToNext());
}
Cursor.close();
try this code if doesnt work, tell me

SQLite two tables, one works, the other does not

I have an SQLite database in an Android app. One database with two tables. simple read in some text and read it out, however, the first of two tables works perfectly and the second table does not and gives errors. I have looked at my code and it seems all correct. I dare anyone to find an error in my code or SQL statements below.
Especially interested in the SQL statements, because my SQL code is PERFECT as far as I know, for both tables, however in the LOGCAT says that a there is no table that I am reading into for table two.
Why would one of my tables work and the other not? Yet they are in the same database and written the same way.
DATABASE OPERATION ON FIRST TABLE; (WORKS PERFECTLY)
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(KEY_NAME, name);
cv.put(KEY_HITS, hits);
ourDatabase.insert(DATABASE_TABLE_1, null, cv);
public String getData() {
String[] columns = new String[] { KEY_ROWID, KEY_NAME, KEY_HITS };
Cursor c = ourDatabase.query(DATABASE_TABLE_1, columns, null, null, null,
null, null);
String result = "";
int iRow = c.getColumnIndex(KEY_ROWID);
int iName = c.getColumnIndex(KEY_NAME);
int iHits = c.getColumnIndex(KEY_HITS);
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
result = result + c.getString(iRow) + " " + c.getString(iName)
+ " " + c.getString(iHits) + "\n";
}
return result;
}
ourHelper.close();
DATABASE OPERATION ON SECOND TABLE; (DOES NOT WORK, ERRORS)
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put( KEY_RESULT, result);
return ourDatabase.insert(DATABASE_TABLE_2, null, cv);
public String getData2() {
// TODO Auto-generated method stub
String[] columns = new String[] { KEY_ROWID, KEY_RESULT, KEY_TABLET, KEY_DATE };
Cursor c = ourDatabase.query(DATABASE_TABLE_2, columns, null, null, null,
null, null);
String result = "";
int iRow = c.getColumnIndex(KEY_ROWID);
int iResult = c.getColumnIndex(KEY_RESULT);
int iTablet = c.getColumnIndex(KEY_TABLET);
int iDate = c.getColumnIndex(KEY_DATE);
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
result = result + c.getString(iRow) + " " + c.getString(iResult)
+ " " + c.getString(iTablet) + " " + c.getString(iDate) + "\n";
}
return result;
}
ourHelper.close();
LOGCAT OUTPUT;
01-31 19:33:01.670: E/AndroidRuntime(6420): FATAL EXCEPTION: main
01-31 19:33:01.670: E/AndroidRuntime(6420):
java.lang.RuntimeException: Unable to start activity ComponentInfo{DBView}:
android.database.sqlite.SQLiteException: no such column: date: , while compiling:
SELECT _id, game_result, tablet_winner, date FROM prizeTable
MORE CODE FOR DETAILS;
public class PlayGame {
public static final String KEY_ROWID="_id";
// for table 1 gameTable
public static final String KEY_NAME="persons_name";
public static final String KEY_HITS="persons_hits";
// for table 2 prizesTable
public static final String KEY_RESULT="game_result";
public static final String KEY_TABLET="tablet_winner";
public static final String KEY_DATE="date";
private static final String DATABASE_NAME="PlayGamesdb";
private static final String DATABASE_TABLE_1="gameTable";
private static final String DATABASE_TABLE_2="prizeTable";
private static final int DATABASE_VERSION = 1;
private static final String CREATE_TABLE_1 = "CREATE TABLE " + DATABASE_TABLE_1 + " (" + KEY_ROWID
+ " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_NAME + " TEXT NOT NULL, " + KEY_HITS + " TEXT NOT NULL);";
private static final String CREATE_TABLE_2 = "CREATE TABLE " + DATABASE_TABLE_2 + " (" + KEY_ROWID
+ " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_RESULT + " TEXT NOT NULL, " + KEY_TABLET
+ " TEXT NOT NULL, " + KEY_DATE + "TEXT NOT NULL);";
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);
}
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_1);
db.execSQL(CREATE_TABLE_2);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE_1 + "AND" + DATABASE_TABLE_2);
onCreate(db);
}
}
<<< EDIT >>>
Safime's suggestion fixed the crashing, that was adding a space between KEY_DATE and TEXT in the creation of the second table.
However still a problem, no more crashing, but the insert() method is still not working. Getting a -1 return shows that it is not inserting anything, and the the table 2 is still empty after inserting a new row to the table. Got to find out why it is failing to create any new rows in the table. Just like earlier, table one works fine but table two is still not working yet.

You are using Constraint NOT NULL and you are inserting only in one column. You must be getting SQLiteConstraintexception Exception. Try inserting in all columns.

You are missing an empty space after the column KEY_DATE and before TEXT on the creation of the second table.
(...) + KEY_DATE + " TEXT NOT NULL); (...)

Probably you have a problem at the create table statement of your second table. Try to open your db file with the sqlite3 command line tool, and see if this table exits. If not, the problem is in the CREATE statement.