Please let me know why my where clause isn't working. I tried using the query instead of rawquery but no luck.
try {
String categoryex = "NAME";
DBHelper dbHelper = new DBHelper(this.getApplicationContext());
MyData = dbHelper.getWritableDatabase();
Cursor c = MyData.rawQuery("SELECT * FROM " + tableName + where Category = '+categoryex'" , null);
if (c != null ) {
if (c.moveToFirst()) {
do {
String firstName = c.getString(c.getColumnIndex("Category"));
String age = c.getString(c.getColumnIndex("Text_Data"));
results.add( firstName + " Directions: " + age);
}while (c.moveToNext());
}
}
} catch (SQLiteException se ) {
Log.e(getClass().getSimpleName(), "Could not create or Open the database");
} finally {
if (MyData != null)
MyData.execSQL("DELETE FROM " + tableName);
MyData.close();
}
try... (you left out a double-quote before where.
Cursor c = MyData.rawQuery("SELECT * FROM " + tableName + " where Category = '" +categoryex + "'" , null);
I think you should use rawQuery in this form:
rawQuery("SELECT * FROM ? where Category = ?", new String[] {tableName, categoryex});
I think it's more secure this way.
Your quotes are buggered:
Cursor c = MyData.rawQuery("SELECT * FROM " + tableName + " where Category = '" + categoryex + "'" , null);
You also should read up on SQL injection attacks.
it will be more easy if you use this technique instead of rawQuery,its easy way change your table name, columns and where conditions accordingly.
public ArrayList<Invitees> getGroupMembers(String group_name) {
ArrayList<Invitees> contacts = new ArrayList<>();
SQLiteDatabase db = this.getReadableDatabase();
String[] projection = {COLUMN_CONTACT, COLUMN_PHONE_NUMBER};
String selection = COLUMN_GROUP_NAME + "=?";
String[] selectionArgs = {group_name};
Cursor cursor = db.query(GROUPS_TABLE_NAME, projection, selection, selectionArgs, null, null, null);
if (cursor.moveToFirst()) {
do {
Invitees invitees = new Invitees();
invitees.setUserName(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_CONTACT)));
invitees.setInviteePhone(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_PHONE_NUMBER)));
contacts.add(invitees);
} while (cursor.moveToNext());
}
return contacts;
}
Related
I am new to the android i am trying to get the cursor values related to the particular column value. but it's showing null.
public int getDashBoardCount() {
String countQuery = "SELECT * FROM " + DASHBOARD_TABLE + " WHERE " + VECHICAL_TYPE + " = " + 'c';
From here also i am getting no such column: c (code 1): , while compiling: SELECT * FROM dashboard_table WHERE vehicle_type = c
String countQuery = "SELECT * FROM " + DASHBOARD_TABLE;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
int cnt = cursor.getCount();
cursor.close();
return cnt;
}
public DashBoardAvaCapModel getVechicalRelAva(String vechical_type) {
SQLiteDatabase db = null;
Cursor cursor = null;
DashBoardAvaCapModel dash = null;
try {
db = this.getReadableDatabase();
cursor = db.query(DASHBOARD_TABLE, new String[]{_ID,
AVAILABLE, CAPACITY, BOOKED, VECHICAL_TYPE}, VECHICAL_TYPE + "=?",
new String[]{String.valueOf(vechical_type)}, null, null, null, null);
int idkey = cursor
.getColumnIndex(_ID);
int available = cursor
.getColumnIndex(AVAILABLE);
int capactity = cursor
.getColumnIndex(CAPACITY);
int booked = cursor
.getColumnIndex(BOOKED);
int vechicaltype = cursor
.getColumnIndex(VECHICAL_TYPE);
if (cursor != null && cursor.moveToFirst())
dash = new DashBoardAvaCapModel(Long.valueOf(cursor.getString(idkey)),
cursor.getString(available), cursor.getString(capactity), cursor.getString(booked), cursor.getString(vechicaltype));
Log.e("dash", "" + cursor.getString(available));
} catch (final Exception ex) {
String exp = String.valueOf(ex);
Log.e("Databa", "" + exp);
} finally {
cursor.close();
db.close();
}
return dash;
}
After writing this line
cursor = db.query(DASHBOARD_TABLE, new String[]{_ID,
AVAILABLE, CAPACITY, BOOKED, VECHICAL_TYPE}, VECHICAL_TYPE + "=?",
new String[]{String.valueOf(vechical_type)}, null, null, null, null);
pls try to write
cursor.moveToFirst();
For first one you can use like
String countQuery = "SELECT * FROM " + DASHBOARD_TABLE + " WHERE " + VECHICAL_TYPE + " = '" + c + "'"
where c is any variable
Hope this will help you
I want to update my database table with multiple where conditions. I already did with single where condition
db.update(TABLE_MISSING_ITEMS, values, KEY_AUTHOR + " = ?",
new String[] { String.valueOf(items.getAuthor()) });
Now i want 2 where condition.
P.S :- No raw query
You can separate the different WHERE conditions with ANDlike this:
db.update(TABLE_NAME,
contentValues,
NAME + " = ? AND " + LASTNAME + " = ?",
new String[]{"Manas", "Bajaj"});
The way I solved my need
public boolean checkHususiKayit(String baslik, String tarih) {
boolean varMi = false;
SQLiteDatabase database = dbHelper.getReadableDatabase();
final String kolonlar[] = {DBHelper.COLUMN_H_ID,
DBHelper.COLUMN_H_ID,
DBHelper.COLUMN_H_BASLIK,
DBHelper.COLUMN_H_TARIH,
DBHelper.COLUMN_H_YOK_TUR,
DBHelper.COLUMN_H_AD,
DBHelper.COLUMN_H_WEB_ID,
DBHelper.COLUMN_H_NUMARA,
DBHelper.COLUMN_H_YURD_ID,
DBHelper.COLUMN_H_YETKILI_AD,
DBHelper.COLUMN_H_YETKILI_ID,
DBHelper.COLUMN_H_TEL,
DBHelper.COLUMN_H_EMAIL,
DBHelper.COLUMN_H_ADDRESS,
DBHelper.COLUMN_H_VAR,
DBHelper.COLUMN_H_GOREVLI,
DBHelper.COLUMN_H_YOK,
DBHelper.COLUMN_H_IZINLI,
DBHelper.COLUMN_H_HATIMDE};
String whereClause = DBHelper.COLUMN_H_BASLIK + " = ? AND " + DBHelper.COLUMN_H_TARIH + " = ?"; // HERE ARE OUR CONDITONS STARTS
String[] whereArgs = {baslik, tarih};
Cursor cursor = database.query(DBHelper.TABLE_NAME_HUSUSI, kolonlar, whereClause, whereArgs, null, null, null + " ASC");
while (cursor.moveToNext()) {
varMi = true;
}
database.close();
cursor.close();
return varMi;
}
THIS CAN ALSO BE DONE LIKE THIS
public void UpdateData(int Cid,int flag,String username,String password)
{
SQLiteDatabase database = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put("Status",flag);//I am updating flag here
database.update(TABLE_NAME, cv, ""+KEY_UserName+"= '"+ username+"' AND "+KEY_CID+"='"+Cid+"' AND "+KEY_Password+"='"+password+"'" , null);
database.close();
}
Try this simple query
db.update(TABLE_FF_CHECKLIST_DATA,contentValues, "FFCHECKLISTID = ? and TASK_ID_CHK = ?" , new String[] {"EHS" , "CTO914"});
where "EHS" is value in column FFCHECKLISTID and CTO914 is value in TASK_ID_CHK.
Im trying to get the data of an entire column into a string array. My database contains two columns Id and Names. I want to read all the entries of the names column and put it into a array. Please help.
EDIT #1:
Im using the following code but i can get only one name with this code.
String query = "Select * FROM " + TABLE_APPS + " WHERE " + COLUMN_NAME + " = \"" + productname + "\"";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(query, null);
if (cursor.moveToFirst()) {
cursor.moveToFirst();
name = cursor.getString(1);
cursor.close();
} else {
name = null;
}
db.close();
int total=0;
Cursor csr=sdb.query("tablename", null, null,null,null,null,null);
csr.moveToFirst();
while(!csr.isAfterLast())
{
total++;
csr.moveToNext();
}
String strarray[] = new String[total];
Cursor csrs=sdb.query("tablename", null, null,null,null,null,null);
csrs.moveToFirst();
int aray=0;
while(!csrs.isAfterLast())
{
strarray[aray]=csrs.getString(1);
aray++;
csrs.moveToNext();
}
I created a table with three columns id, name and discipline.
I want to find the student name given the discipline.
Following is my method:
String findstudent(String disc){
SQLiteDatabase sqLiteDatabase = this.getReadableDatabase();
String find = "SELECT * FROM "+ TABLE_STUDENTS + " WHERE "+KEY_DISCIPLINE +" = " +disc ;
Cursor cursor = sqLiteDatabase.rawQuery(find,null);
cursor.moveToFirst();
String found =cursor.getString(1);
return found;
}
When I use it, the application stops working.
I am not sure. But, you can try this way
Cursor.moveToFirst();
do{
//get the data
String found =cursor.getString(cursor.getColumnIndexOrThrow("COLUMN NAME"));
}while(Cursor.moveNext);
Try the following code:
String find = "SELECT *<enter code here>
FROM "+ TABLE_STUDENTS + "
WHERE "+KEY_DISCIPLINE +" = '" + disc + "'" ;
Try this:
String findstudent(String disc){
Cursor cursor;
cursor = this.db.query(TABLE_STUDENTS,null, KEY_DISCIPLINE +" = "+ disc, null, null, null, null,null );
cursor.moveToFirst();
String found =cursor.getString(0);
return found;
}
Hope it Helps!!
public Cursor findstudent(String disc){
SQLiteDatabase sqLiteDatabase = this.getReadableDatabase();
String[] find = new String[]{ col1,col2,col3};//all fields in db in need
String order=col1;
Cursor c=db.query(TABLE_STUDENTS, find, KEY_DISCIPLINE +" = " +disc, null, null, null, order);
c.moveToFirst();
db.close();
return c;
}
In the activity include this:
DataBaseHandler db = new DataBaseHandler(this);
try {
Cursor c = db.displayName(your_disc);
startManagingCursor(c);
if (!c.moveToFirst()) {
System.out.println("!Move " + posnumber);
} else {
String idname = c.getString(c
.getColumnIndex(DataBaseHandler.KEY_NAME));
System.out.println("null:");
System.out.println("Move " + idname);
return true;
}
c.close();
stopManagingCursor(c);
} catch (Exception ex) {
}
public String getContact(String searchName) {
SQLiteDatabase db = this.getReadableDatabase();
String[] args = { searchName };
Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_MOVIES
+ " WHERE name =? ", args);
String iName = null, iDiretor = null, iGenre = null;
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
iName = cursor.getString(cursor.getColumnIndex(KEY_NAME));
iDiretor = cursor.getString(cursor.getColumnIndex(KEY_DIRECTOR));
iGenre = cursor.getString(cursor.getColumnIndex(KEY_GENRE));
cursor.moveToNext();
}
cursor.close();
The iName variable is working fine but the other two are returning null. Any help?
Use the SQLiteDatabase query methods instead of rawQuery for the best results.
db.query(TABLE_MOVIES, null, "name = ?", args, null);
This is preferred because rawQuery is easy to mess up and doesn't protect against SQL injections.
Try this way:
Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_MOVIES + " WHERE name LIKE ? ", args);
Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_MOVIES
+ " WHERE name LIKE "+searchName, null); // Put Like When your are comparing String