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Getting specific value from Array which does not exist in database

I'm trying to get the value or data from the array that doesn't exists in the database.
public Cursor checkExistence(){
Cursor c=null;
String[] values={"headache","cold"};
SQLiteDatabase db= getReadableDatabase();
String query="SELECT * FROM "+TABLE_SYMPTOMS+" WHERE "+COLUMN_SYMP+" IN ("+toArrayRep(values)+")";
c=db.rawQuery(query,null);
Log.i("From Cursor","Cursor Count : " + c.getCount());
if(c.getCount()>0){
String val= c.getString()
Log.i("From Cursor","No insertion");
}else{
Log.i("From Cursor","Insertion");
}
db.close();
return c;
}
public static String toArrayRep(String[] in) {
StringBuilder result = new StringBuilder();
for (int i = 0; i < in.length; i++) {
if (i != 0) {
result.append(",");
}
result.append("'" + in[i] + "'");
}
return result.toString();
}
In the String values={"headache","cold"} ,headache exists but cold does not exist in the database. From the code above, the Cursor returns Count=1 which is count>0 hence i can't insert into table.I would like to know how i can independently check whether the individual data exists, and the one which doesn't exist will be inserted into table.So in this case, "Cold" would be able to be inserted into the table.

If you use a single query to check all values, then what you get is a list of existing values, and you still have to search in the original list for any differences.
It is simpler to check each value individually:
String[] values = { "headache", "cold" };
SQLiteDatabase db = getReadableDatabase();
db.beginTransaction();
try {
for (String value : values) {
long count = DatabaseUtils.queryNumEntries(db,
TABLE_SYMPTOMS, COLUMN_SYMP+" = ?", new String[] { value });
if (count == 0) {
ContentValues cv = new ContentValues();
cv.put(COLUMN_SYMP, value);
db.insert(TABLE_SYMPTOMS, null, cv);
}
}
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}

You need check Cursor.moveToFirst()
True = Have records in cursor.
False = Dont have records.
Example my code:
return database.query( table.getNameTable(),
table.getColumns(),
table.getWhereSelectTableScript(),
null,
table.getGroupBySelectTableScript(),
table.getHavingSelectTableScript(),
table.getOrderBySelectTableScript(),
table.getLimitRecordsSelectTableScript());
See more here !

how to get String array in reverse order in Sqlite in android

public String[] getAllDescription() {
db = this.getReadableDatabase();
cursor = db.query(NOTIFICATIONTABLE, new String[]{"notification_id", "notification_title",
"notification_description", "notification_isread", "date"}, null, null, null,
null, null);
String[] result = new String[cursor.getCount()];
int i = 0;
if (cursor.moveToFirst()) {
do {
result[i] = cursor.getString(cursor.getColumnIndex("notification_description"));
i++;
} while (cursor.moveToNext());
}
if ((cursor != null) && !cursor.isClosed()) {
cursor.close();
db.close();
}
return result;
}
this is my code currently i am getting from 0 to n data in staring array i want to get in reverse array data from n to 0 so that i can Print please suggest me how i will get data

Try this method :
public ArrayList<String> getAllDescription()
{
ArrayList<String> array_list = new ArrayListString>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor res = db.rawQuery("SELECT * " + " FROM " + NOTIFICATIONTABLE+ " DESC;", null);
res.moveToFirst();
while (res.isAfterLast() == false)
{
array_list.add(hashmap);
res.moveToNext();
}
return array_list;
}
Or If you want to reverse arrayList then you can also do it By just a single line of code .
Collections.reverse("yourArrayList");
Hope it will help you.

i am getting from 0 to n data in staring array i want to get in
reverse array data from n to 0
Why not using ASC or DESC in db query to get result in sequence as want according to notification_description column.
do it as:
cursor = db.query(NOTIFICATIONTABLE,
new String[]{"notification_id",
"notification_title",
"notification_description",
"notification_isread",
"date"}, null, null, null,
null, "notification_description DESC");

You can insert the data from end of theString[]...
public String[] getAllDescription() {
db = this.getReadableDatabase();
cursor = db.query(NOTIFICATIONTABLE, new String[]{"notification_id", "notification_title",
"notification_description", "notification_isread", "date"}, null, null, null,
null, null);
String[] result = new String[cursor.getCount()];
int i = 0;
if (cursor.moveToFirst()) {
do {
///////////////////////
result[(cursor.getCount()-1)-i] = cursor.getString(cursor.getColumnIndex("notification_description"));
///////////////////////
i++;
} while (cursor.moveToNext());
}
if ((cursor != null) && !cursor.isClosed()) {
cursor.close();
db.close();
}
return result;
}

Unable to fetch data while Query excuting in android Sqlite

public String[] getNewsLink(String prodcuttye) {
Cursor cursor = mDb.query(SQLITE_TABLE, new String[] { "productname" }, "ProdctType='"
+ prodcuttye + "'", null, null, null, null, null);
String[] result = new String[cursor.getCount()];
int i = 0;
if (cursor.moveToFirst()) {
do {
result[i] = cursor.getString(cursor.getColumnIndex("productname"));
i++;
} while (cursor.moveToNext());
}
if ((cursor != null) && !cursor.isClosed()) {
cursor.close();
mDb.close();
}
return result;
}
This function for fetch data in String array i am trying to excute this Query am getting data when i am call the in Sqlite browser[ select productname from MyShopingTable where ProdctType= 'Basmati Rice'] But when i try to run this Query in function i am getting cursor count 0 so i am unable to get data please tell me where am doing wrong please suggest me

Try changing your query like following :
Cursor c = mDb.query("SELECT * FROM MyShopingTable where ProdctType = ?",new String[]{prodcuttye})
See if that works in your case...

How to read entire sqlite database in android

Please help me with following, I have a database which contain strings ( e.g. fotonames ).
And I want to read entire fotonames column into an arraylist.
How can I do this?

public Cursor getfotoname() throws SQLException
{
String getRT = "SELECT fotonames from "+ TABLE_NAME+";";
Cursor mCur = sqldb.rawQuery(getRT, null);
return mCur;
}
Now when you call
Cursor mCursor=null;
mCursor= DatabaseObject.getfotoname();
ArrayList<WhateverTypeYouWant> mArrayList = new ArrayList<WhateverTypeYouWant>();
for(mCursor.moveToFirst(); mCursor.moveToNext(); mCursor.isAfterLast()) {
// The Cursor is now set to the right position
mArrayList.add(mCursor.getWhateverTypeYouWant(WHATEVER_COLUMN_INDEX_YOU_WANT));
}

Have a look at this tutorial will help you
http://www.anotherandroidblog.com/2010/08/04/android-database-tutorial/
this is where you can lear how to fetch all values from one column
http://www.anotherandroidblog.com/2010/08/04/android-database-tutorial/3/#getrowasarray
or otherway is
fire query like this
public Cursor columnValues() throws SQLException{
// TODO Auto-generated method stub
Cursor mCursor = db.query(Course_Info_Table,
new String[] {Column1 , column2 },
null,null, null, null, null);
//Cursor mCursor = mDb.rawQuery("Select",null);
if (mCursor != null)
{
mCursor.moveToFirst();
}
return mCursor;
}
and receive it like
ArrayList<String> list1 = new ArrayList<String>();
ArrayList<String> list12 = new ArrayList<String>();
cursor = dbm.columnValueofCourse();
cursor.moveToFirst();
startManagingCursor(cursor);
for (int i = 0; i < cursor.getCount(); i++) {
String reciv = cursor.getString(cursor
.getColumnIndex("column1"));
String reciv3 = cursor.getString(cursor
.getColumnIndex("column2"));
list1.add(reciv);
list2.add(reciv3);
cursor.moveToNext();
}

fetching data from sqlite into array in android

The code to returns all the data in the table in list.But this isn't working.
I've called this method from CheckData class which is called by main class
public List<String[]> selectAll() {
List<String[]> list = new ArrayList<String[]>();
Cursor cursor = db
.query(TABLE_NAME, null, null, null, null, null, null);
int x = 0;
if (cursor.moveToFirst()) {
do {
String[] b1 = new String[] { cursor.getString(1),
cursor.getString(2) };
list.add(b1);
x = x + 1;
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
cursor.close();
return list;
}
My database contains 3 columns - id(integer primary key), symbol(text) and company_name(text).
My Data Base name is AppDB and table name is scrip.

Here are the good tutorial to LEARN use of Android-SQLite.
so,I also advise you the same As I answered here