How to get Last record from Sqlite?
I have a one table question_table
and one ImageButton
(Back). I need to get the last inserted record from the database after clicking on the Back.
My row contains the following columns: question
, optionA
, optionB
, optionC
, optionD
, and I need the data for use on my Activity
. I create one method in database but it's not working.
Here is code for reference:
MySQLiteHelper.java extract:
public List<ObjectiveWiseQuestion> getLastInsertQuestion()
{
// long index = 0;
List<ObjectiveWiseQuestion>LocwiseProfileList=new ArrayList<ObjectiveWiseQuestion>();
db = getReadableDatabase();
Cursor cursor = db.query(
"sqlite_sequence",
new String[]{"seq"},
"name = ?",
new String[]{TABLE_QUESTION},
null,
null,
null,
null );
if (cursor.moveToFirst())
{
do {
ObjectiveWiseQuestion owq= new ObjectiveWiseQuestion();
owq.setQuestion(cursor.getString(2));
owq.setOptionA(cursor.getString(3));
owq.setOptionB(cursor.getString(4));
owq.setOptionC(cursor.getString(5));
owq.setOptionD(cursor.getString(6));
owq.setCorrectOption(cursor.getString(7));
LocwiseProfileList.add(owq);
} while(cursor.moveToNext());
db.close();
}
return LocwiseProfileList;
}
OnClickListner
from AddQuestionActivity.java
imgBack.setOnClickListener( new View.OnClickListener()
{
@Override
public void onClick(View v)
{
msg();
emptyFormField();
try {
final List<ObjectiveWiseQuestion> LocWiseProfile = db.getLastInsertQuestion();
for (final ObjectiveWiseQuestion cn : LocWiseProfile)
{
db=new MySQLiteHelper(getBaseContext());
db.getWritableDatabase();
txtQuestion.setText(cn.getQuestion());
txtOptionA.setText(cn.getOptionA());
txtOptionB.setText(cn.getOptionB());
txtOptionC.setText(cn.getOptionC());
txtOptionD.setText(cn.getOptionD());
txtCorrectOption.setText(cn.getCorrectOption());
db.close();
}
} catch(Exception e) {
e.printStackTrace();
}
}
});
Please give me some hint.
Solution 1:
I think the top answer is a bit verbose, just use this
SELECT * FROM table ORDER BY column DESC LIMIT 1;
Solution 2:
Try this:
SELECT *
FROM TABLE
WHERE ID = (SELECT MAX(ID) FROM TABLE);
OR
you can also used following solution:
SELECT * FROM tablename ORDER BY column DESC LIMIT 1;
Solution 3:
To get last record from your table..
String selectQuery = "SELECT * FROM " + "sqlite_sequence";
Cursor cursor = db.rawQuery(selectQuery, null);
cursor.moveToLast();
Solution 4:
Here's a simple example that simply returns the last line without need to sort anything from any column:
"SELECT * FROM TableName ORDER BY rowid DESC LIMIT 1;"
Solution 5:
I think it would be better if you use the method query from SQLiteDatabase class instead of the whole SQL string, which would be:
Cursor cursor = sqLiteDatabase.query(TABLE, allColluns, null, null, null, null, ID +" DESC", "1");
The last two parameters are ORDER BY and LIMIT.
You can see more at: http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html