Display only one field of table using database in android

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Display only one field of table using database in android

I want only one field ExpNo from table where table have fields like
ExpNo, ExpName, Amt1, Amt2

But According them i want only one field to disply ExpNo which was last entered because i want last entered value(Automatically generated) + 1

Sql query like : select MAX(ExpNo) from TableName;

(please help to write it on android)

i was write the code like this :

public void dispExpNo()  
{
    String[] exno = {"ExpNo"};  
    Cursor c = db.query("tb_expense",exno,null,null,null,null,null);                
    txtExpno.setText(""+c.getInt(0));
    c.close();          
}

Posted 4-Oct-12 18:17pm

Anil Dalsaniya

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2 solutions

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Mike DiGiovanni · Accepted Answer · 2012-10-09T04:10:00

Solution 1

Take a look at
http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html[^]

This will let you execute your select max() query without fiddling with the Android database help methods. You will still get a plain old Cursor back,

Posted 9-Oct-12 4:10am

Mike DiGiovanni

Updated 10-Oct-12 6:48am

v2

Anil Dalsaniya · Accepted Answer · 2012-10-10T06:44:00

Solution 2

C#

SqlDatabase db;
Cursor cur = db.rawQuery("SELECT MAX(_ID) FROM tb_expense;",null);
startManagingCursor(cur);    
cur.moveToFirst();

while(!cur.isAfterLast())
{
    int id  = cur.getInt(0);						
    txt id1 = id + 1;
    txtID.setText(Integer.valueOf(id1).toString());
    cur.moveToNext();
}

Posted 10-Oct-12 6:44am

Anil Dalsaniya

Updated 10-Oct-12 6:46am

v2