Develop Reference

Foreign key isnt created on android studio but tables is created

I have 2 tables : registereduser, listbands. listbands has foreign key referencing registereduser(id)
I managed to create both tables in the databases, however when i create a new user the listbands fields are empty! It should have the id of registereduser.
Here is my code :
public class DatabaseHelper extends SQLiteOpenHelper {
//User table
public static final String DATABASE_NAME ="bands.db";
public static final String TABLE_USER ="registereduser";
public static final String COL_USER_ID ="BID";
public static final String COL_USER_EMAIL ="email";
public static final String COL_USER_PASS ="password";
//bands table
public static final String TABLE_LIST ="listbands";
public static final String COL_LIST_ID ="LID";
public static final String COL_LIST_FK ="BID";
public static final String COL_LIST_NAME ="name";
public DatabaseHelper(#Nullable Context context ) {
super(context, DATABASE_NAME, null , 1);
}
#Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
sqLiteDatabase.execSQL("CREATE TABLE registereduser (BID INTEGER PRIMARY KEY AUTOINCREMENT, " +
"email TEXT , password TEXT )");
sqLiteDatabase.execSQL("CREATE TABLE listbands (LID INTEGER PRIMARY KEY AUTOINCREMENT ," +
"BID INTEGER NOT NULL, name TEXT, FOREIGN KEY(BID) REFERENCES registereduser(BID) )");
}
#Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int oldVersion, int newVersion) {
sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + TABLE_USER);
sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + TABLE_LIST);
onCreate(sqLiteDatabase);
}
#Override
public void onOpen(SQLiteDatabase sqLiteDatabase) {
super.onOpen(sqLiteDatabase);
//enable foreign key constraints like ON UPDATE CASCADE, ON DELETE CASCADE
sqLiteDatabase.execSQL("PRAGMA foreign_keys=ON;");
}
public long addUser(String email, String password) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(" email ",email);
contentValues.put(" password ",password);
long res = db.insert("registereduser", null, contentValues);
db.close();
return res;
}
public long addList(String name) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentLists = new ContentValues();
contentLists.put(" name ",name);
long rest = db.insert("listbands", null, contentLists);
db.close();
return rest;
}
public boolean checkUser ( String email, String password){
String[] column = {COL_USER_ID};
SQLiteDatabase db = getReadableDatabase();
String choice = COL_USER_EMAIL + "=?" + " and " + COL_USER_PASS + "=?";
String[] choiceArgs = { email, password};
Cursor cursor = db.query(TABLE_USER, column, choice, choiceArgs, null, null, null);
int count = cursor.getCount();
cursor.close();
db.close();
if (count>0)
return true;
else
return false;
}
}
and this is the screenshoot that my listbands is empty:
this is screenshoot from sqlite manager

Defining a Foreign Key doesn't automatically insert data into the child table (listbands table) when a row is added to the parent table (registereduser table).
That is a Foreign Key defines a constraint (rule) saying that the value of the child column(s) must be in a row of the parent table's column(s) when inserting or updating rows in the child table.
You need to add the rows to the child table as and when required.
What the screenshot is showing is that there are now rows in the listBands table.
Currently your code has an addList method this will not work as it is as the result will be a NOT NULL constraint conflict. However, it won't fail as the exception is trapped by the insert method. However if you were to look at the value returned it would be -1 rather than 1 or greater (the id of the inserted row).
You would need to use something like :-
public long addListProper(String name, long id) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(COL_LIST_FK,id);
cv.put(COL_LIST_NAME,name);
return db.insert(TABLE_LIST,null,cv);
}
to insert a listbands row.
Example
Consider the following which :-
Deletes all rows form the listbands table.
Deletes all rows from the registereduser table.
Note that as registereduser may include parents of listbands rows then listbands should be deleted first.
These two steps are just to make it so the tables are empty each time the demo is run.
Adds a user
Adds a list (that WILL NOT be added)
Adds a list using the alternative/proper insert that uses the ID of the user
Logs info regrading the id's of the inserts.
Extracts the rows from the tables into a cursor which is dumped to the log.
The code :-
mDBHlpr = new DatabaseHelper(this);
mDBHlpr.getWritableDatabase().delete(DatabaseHelper.TABLE_LIST,null,null);
mDBHlpr.getWritableDatabase().delete(DatabaseHelper.TABLE_USER,null,null);
long this_user = mDBHlpr.addUser("Fred","1234567890");
long this_list = mDBHlpr.addList("Blah"); //<<<<<<<<<< WILL NOT WORK
long alt_list = mDBHlpr.addListProper("blah blah",this_user); //<<<<<<<<< SHOULD WORK
Log.d("INSERTIFO","ID of user was " + this_user + " ID of list was " + this_list);
DatabaseUtils.dumpCursor(
mDBHlpr.getWritableDatabase().query(DatabaseHelper.TABLE_USER,null,null,null,null,null,null)
);
DatabaseUtils.dumpCursor(
mDBHlpr.getWritableDatabase().query(DatabaseHelper.TABLE_LIST,null,null,null,null,null,null)
);
Results
First in the log will be :-
2019-10-27 12:45:00.152 32338-32338/aso.so58575523foreignkeys E/SQLiteDatabase: Error inserting name =Blah
android.database.sqlite.SQLiteConstraintException: NOT NULL constraint failed: listbands.BID (code 1299 SQLITE_CONSTRAINT_NOTNULL)
at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:879)
at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:790)
at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:88)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1599)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1468)
at aso.so58575523foreignkeys.DatabaseHelper.addList(DatabaseHelper.java:76)
at aso.so58575523foreignkeys.MainActivity.onCreate(MainActivity.java:22)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
i.e. the addList has failed because BID column is null and thus the row is not inserted because of the NOT NULL constraint. Although the stack-trace is in the log the exception was trapped and thus processing continues.
The Log will then have :-
2019-10-27 12:45:00.165 D/INSERTIFO: ID of user was 3 ID of list was -1 ID of alternative list item was 2
see how the attempt to use addList resulted in an id of -1.
then :-
2019-10-27 12:45:00.165 I/System.out: >>>>> Dumping cursor android.database.sqlite.SQLiteCursor#561c44
2019-10-27 12:45:00.166 I/System.out: 0 {
2019-10-27 12:45:00.166 I/System.out: BID=3
2019-10-27 12:45:00.166 I/System.out: email=Fred
2019-10-27 12:45:00.166 I/System.out: password=1234567890
2019-10-27 12:45:00.166 I/System.out: }
2019-10-27 12:45:00.166 I/System.out: <<<<<
2019-10-27 12:45:00.167 I/System.out: >>>>> Dumping cursor android.database.sqlite.SQLiteCursor#1def12d
2019-10-27 12:45:00.167 I/System.out: 0 {
2019-10-27 12:45:00.167 I/System.out: LID=2
2019-10-27 12:45:00.167 I/System.out: BID=3
2019-10-27 12:45:00.167 I/System.out: name=blah blah
2019-10-27 12:45:00.167 I/System.out: }
2019-10-27 12:45:00.167 I/System.out: <<<<<
As can be seen the 2nd attempt (using addListProper) has added a row to listbands and there was no Foreign Key constraint conflict or the NOT NULL constraint conflict that originally stopped the row being added.
Extra
consider this line of code :-
long otheralter_list = mDBHlpr.addListProper("not blah",100); //<<<<<<< FK constraint as no user with an ID of 100.
A row is trying to be added that references a user with an id of 100 (no such user exists). The row will not be inserted (but again will not result in a failure) because of the Foreign Key constraint as no row in the registereduser table (the parent table of the Foreign Key) has 100 in the BID column (the parent column).
The result in the log would be :-
2019-10-27 13:12:39.272 32564-32564/? E/SQLiteDatabase: Error inserting BID=100 name=not blah
android.database.sqlite.SQLiteConstraintException: FOREIGN KEY constraint failed (code 787 SQLITE_CONSTRAINT_FOREIGNKEY)
at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:879)
at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:790)
at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:88)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1599)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1468)
at aso.so58575523foreignkeys.DatabaseHelper.addListProper(DatabaseHelper.java:86)
at aso.so58575523foreignkeys.MainActivity.onCreate(MainActivity.java:24)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Additional Re comment
So i must use CONSTRAINT in the listbands table to create a foreign key?
No you have correctly defined the Foreign Key. CONSTRAINT ???? FOREIGN KEY just gives the Constraint a name. It doesn't alter what the constraint does.
The listbands table also dont have ID even though its created as AUTOINCREMENT
No. The screen shots shows that there is no data at all in the listbands table (due to the NOT NULL constraint as explained above).
AUTOINCREMENT does very little INTEGER PRIMARY KEY is what allows an auto-generated value to be provided. Although this isn't actually correct as all that INTEGER PRIMARY KEY does is make the column an alias of the normally hidden rowid column, which is an automatically generated column for all tables except those defined using WITHOUT ROWID.
AUTOINCREMENT supplements the alias with an additional rule, that SQLite will adhere to if possible saying that the automatically generated value is greater then any previously allocated. Without AUTOINCREMENT and IF the largest possible value of the rowid (9223372036854775807) has been used then a lower value may be used. Without AUTOINCREMENT then SQLIte will instead issue an SQLITE_FULL exception.
AUTOINCREMENT uses an additional table, sqlite_sequence, to store the last assigned value of the rowid. As such inefficiencies are introduced in managing this extra table.
If AUTOINCREMENT WERE removed then there would be no noticeable difference.

SQLite Column Error : table XXXX has no column named ZZZZ

I'm trying to insert rows in my Student Table which contains two rows : ID and Name
Here is the addHandler function which is implemented in MyDBHandler class :
public void addHandler(Student student) {
ContentValues values = new ContentValues();
values.put(COLUMN_ID, student.getID());
values.put(COLUMN_NAME, student.getStudentName());
SQLiteDatabase db = this.getWritableDatabase();
db.insert(TABLE_NAME, null, values);
db.close();
}
The onCreate method is :-
public void onCreate(SQLiteDatabase db) {
String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + "(" + COLUMN_ID + " INTEGER PRIMARY KEY ," + COLUMN_NAME + " TEXT )";
db.execSQL(CREATE_TABLE);
}
The attributes of MyDBHandler class which extends SQLiteOpenHelper :
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "studentDB.db";
public static final String TABLE_NAME = "Student";
public static final String COLUMN_ID = "StudentID";
public static final String COLUMN_NAME = "StudentName";
I have a ADD Button in my activity_main.xml file and here is the code behind :
public void add(View view){
MyDBHandler dbHandler = new MyDBHandler(this, null, null, 1);
int id = Integer.parseInt(studentIdText.getText().toString());
String name = studentNameText.getText().toString();
Student student = new Student(id, name);
dbHandler.addHandler(student);
studentIdText.setText("");
studentNameText.setText("");
}
The app is running perfectly but when i want to insert a row in the table , i get the following errors in Run Tab :
E/SQLiteLog: (1) table Student has no column named StudentID
E/SQLiteDatabase: Error inserting StudentName=yassine StudentID=10
android.database.sqlite.SQLiteException: table Student has no column named StudentID (code 1): , while compiling: INSERT INTO Student(StudentName,StudentID) VALUES (?,?)
#################################################################
Error Code : 1 (SQLITE_ERROR)
Caused By : SQL(query) error or missing database.
(table Student has no column named StudentID (code 1): , while compiling: INSERT INTO Student(StudentName,StudentID) VALUES (?,?))
#################################################################
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1093)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:670)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:59)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1607)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1479)
at com.example.test.MyDBHandler.addHandler(MyDBHandler.java:48)
at com.example.test.MainActivity.add(MainActivity.java:40)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)
at android.view.View.performClick(View.java:5246)
at android.widget.TextView.performClick(TextView.java:10566)
at android.view.View$PerformClick.run(View.java:21256)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6917)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Any recommendations ?

Your issue is very likely a mis-conception in regard to the onCreate method. That is it onCreate doesn't run every time the App is run. onCreate will only run if the database doesn't actually exist. If the database has already been created by another previous run of the App then the onCreate method is not run.
As such any changes made to the structure of the database, as typically applied in the onCreate method will not be applied.
It would appear that you have added the defnition for the StudentId column, to the code in the onCreate method, after the App has been run.
As long as you have no data that needs to be preserved (which is very likely) then the simplest solution is to do 1 of the following :-
delete or clear the App's data (via settings/Apps)
uninstall the App
and then rerun the App, the database will then be created using the code as per the modified onCreate code.

android.database.sqlite.SQLiteException: no such column: UPDATE

There is something wrong with my update statement. I am trying to update an user from my database, I am sure this user is in my database, but I just can't update him. I think I have a fault with my column name because the error said:
android.database.sqlite.SQLiteException: no such column: UPDATE
But I never asked for this column, nnn isn't a column at all in my scheme. Here is the statement
public void changeprofiel(String id, Profiel p){
SQLiteDatabase db = this.getWritableDatabase();
/* ContentValues contentValues = new ContentValues();
contentValues.put(COL_2_PROFIELEN, p.getUsername());
contentValues.put(COL_3_PROFIELEN, p.getFirstname());
contentValues.put(COL_4_PROFIELEN, p.getEmail());
contentValues.put(COL_5_PROFIELEN, p.getPassword());*/
// de insert methode geeft -1 terug als het niet gelukt is en de row value als het wel gelukt is
System.out.println(getProfielWid(id).getId());
// db.update(TABLE_NAME_PROFIELEN, contentValues,COL_1_PROFIELEN ="'" + id +"'",null);
db.execSQL("UPDATE "+ TABLE_NAME_PROFIELEN + " SET "+COL_2_PROFIELEN+" = "+p.getUsername()+", " +COL_3_PROFIELEN+" = "+p.getFirstname()+", "+COL_4_PROFIELEN+" = "+p.getEmail()+", "+COL_5_PROFIELEN+" = "+p.getPassword()+
" WHERE " + COL_1_PROFIELEN + "=" + id + "");
}
I also tried this way for the where closule:
" WHERE " + COL_1_PROFIELEN + "='" + id + "'");
But they give me both this error:
I/System.out: nnnnnn
E/SQLiteLog: (1) no such column: nnn
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.cedri.bcv, PID: 13908
android.database.sqlite.SQLiteException: no such column: nnn (code 1): , while compiling: UPDATE profielen SET username = nnn, firstname = nnn, email = nnn, password = xxx WHERE profile_id=nnnnnn
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1677)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1608)
at com.example.cedri.bcv.DB.DatabaseHelper.changeprofiel(DatabaseHelper.java:82)
at com.example.cedri.bcv.Activities.MainActivity.savechanges(MainActivity.java:94)
at com.example.cedri.bcv.Fragments.AccountFragment$1.onClick(AccountFragment.java:86)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6121)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Do I need to set every value between single quotes?

You need to wrap your values with single quotes ('') if the column's type is text.
Your query should look like this:
UPDATE profielen SET username = 'nnn', firstname = 'nnn', email = 'nnn', password = 'xxx'
WHERE profile_id='nnnnnn'

How to insert a new row of table of sqlite in android?

I am working on a attendance apps for teacher. I have created database and trying to insert a new row but I am getting errors.I am giving few necessary code below.
Database creation is as:
String aquery="CREATE TABLE "+ATTENDANCE_TABLE_NAME+" ( COLUMN_DATE TEXT PRIMARY KEY );";
db.execSQL(aquery);
And ALTER the table as:
String aquery="ALTER TABLE "+ATTENDANCE_TABLE_NAME+" ADD COLUMN '"+new_col_name+"' TEXT;";
db.execSQL(aquery);
now I am inserting a row a new row as:
ContentValues Values=new ContentValues();
SQLiteDatabase db=getWritableDatabase();
// finding all column
Cursor dbCursor = db.query(ATTENDANCE_TABLE_NAME, null, null, null, null, null, null);
String[] columnNames = dbCursor.getColumnNames();
String zero="0";
for (int i=0;i<columnNames.length;i++)
{
// saving values to each specific column
if(i==0)
Values.put("COLUMN_DATE", date );
else
Values.put(columnNames[i],"'"+zero+"'");
}
check = db.insert(ATTENDANCE_TABLE_NAME, null , Values);
But I am getting this error:
05-25 18:52:23.023 19480-19480/com.example.vikas.scannerproject E/SQLiteLog: (1) near "14202": syntax error
05-25 18:52:23.023 19480-19480/com.example.vikas.scannerproject E/SQLiteDatabase: Error inserting COLUMN_DATE=2017-05-25 14202='0'
android.database.sqlite.SQLiteException: near "14202": syntax error (code 1): , while compiling: INSERT INTO CSE_OS_2017_ATTENDANCE(COLUMN_DATE,14202) VALUES (?,?)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:498)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1341)
at com.example.vikas.scannerproject.Index_DBHandler.takingAttendance(Index_DBHandler.java:148)
at com.example.vikas.scannerproject.ScanresultActivity.takeAttendance(ScanresultActivity.java:44)
at com.example.vikas.scannerproject.ScanresultActivity.onCreate(ScanresultActivity.java:32)
at android.app.Activity.performCreate(Activity.java:6303)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2376)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483)
at android.app.ActivityThread.access$900(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5441)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)
Please help me in insertion of new row.

Column Names in SqLite may not start with a number[0-9]. Change the column name to something like "A14202".
BTW Adding a column for each assignment may not be the best design. SqLite will only allow 2000 columns.

Column names in sqlite should be start with the Alphabet letter{A-Z,a-z}.
It should not start with numeric value.
Try this:
String aquery="ALTER TABLE "+ATTENDANCE_TABLE_NAME+" ADD COLUMN '"+"A"+new_col_name+"' TEXT;";
db.execSQL(aquery);

Sqlite column fails to create in creation time

I'm facing a strange problem. I'm creating a db in sqlite with the below query
String GROUP_TABLE = "groups";
String ROW_ID = "rowid";
String GROUP_ID = "GroupID";
String GROUP_NAME = "GroupName";
String GROUP_STATUS = "GroupStatus";
String IS_ADMIN = "IsAdmin";
String GROUP_TYPE = "GroupType";
String IS_PUBLIC = "IsPublic";
String LAST_UPDATE = "LastUpdate";
String groupQuery = "CREATE TABLE IF NOT EXISTS "+ GROUP_TABLE +" ("
+ROW_ID+" INTEGER PRIMARY KEY, "
+GROUP_ID+" TEXT, "
+GROUP_NAME+" TEXT, "
+GROUP_STATUS+" TEXT, "
+GROUP_TYPE+" TEXT, "
+IS_ADMIN+" TEXT, "
+IS_PUBLIC+" TEXT, "
+LAST_UPDATE+" TEXT);";
This is the schema given by sqlite adb command
H:\adt-bundle-windows-x86_64-20140702\sdk\platform-tools>sqlite3
SQLite version 3.8.10.2 2015-05-20 18:17:19
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> .open mydb.db
sqlite> .full schema
Usage: .fullschema
sqlite> .fullschema
CREATE TABLE android_metadata (locale TEXT);
CREATE TABLE groups (rowid INTEGER PRIMARY KEY, GroupID TEXT, GroupName TEXT, GroupStatus TEXT, GroupType TEXT, IsAdmin TEXT, IsPubli
c TEXT, LastUpdate TEXT);
/* No STAT tables available */
and when I enter records for the first time there will be no problem. But when I try to enter records next time i get
E/SQLiteLog﹕ (1) table groups has no column named LastUpdate
11-04 14:35:01.850 11947-11974/? E/SQLiteDatabase﹕ Error inserting GroupType=1 GroupID=553 LastUpdate=2015-08-08T14:17:14.000Z IsAdmin=1 GroupName=SAIFOOTWEARS GroupStatus=1
android.database.sqlite.SQLiteException: table groups has no column named LastUpdate (code 1): , while compiling: INSERT INTO groups(GroupType,GroupID,LastUpdate,IsAdmin,GroupName,GroupStatus) VALUES (?,?,?,?,?,?)
And when I check the schema again the column is missing.
H:\adt-bundle-windows-x86_64-20140702\sdk\platform-tools>sqlite3
SQLite version 3.8.10.2 2015-05-20 18:17:19
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> .open mydb.db
sqlite> .fullschema
CREATE TABLE android_metadata (locale TEXT);
CREATE TABLE groups ( rowId INTEGER PRIMARY KEY,GroupID TEXT, GroupName TEXT,GroupStatus TEXT,IsAdmin TEXT, GroupType TEXT, IsPublic
TEXT);
/* No STAT tables available */
Any leads on this would be of great help.

onCreate() method of sqliteOpenHelpers called when the database is created for the first time. This is where the creation of tables and the initial population of the tables should happen.
I think first time when you created your database you don't include LastUpdate column. Later you included it.but your table is created first time.So when adb get same database version for your app it dose not update your database.
So try this
Change your databse version no. Or uninstall app from your phone and run it again.
If problem does not solve.Then please provide full code of your class in Question.