SQLite UPDATE语句更新表中的所有行

Question

When adding a new row to my table, I check if the row already exist, if it does, I update the row else a new row is created. This works fine when I have only one row in my table. But when I add another row and perform the same operation, all the rows in the table are updated.

Am working with these test data:

Test 1

debtorName: Ann Droid
totalOwed = 200

and this is the result:

When I run the app again with the same test data, I get this result (as expected)

Test 2

debtorName: Vera Brown
totalOwed: 700

I get the expected result, nothing changes in the first row:

but when I try to update add a new record for the second row with this test data (or any other)

debtorName: Vera Brown
amountOwed: 200

this happens:

I've been trying to figure this out for the past 24 hours with no luck. This is the update code:

public boolean updateRecord(String id,  int newTotalDebt, double newTotalOwed) {

    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();

    int newTotalDebts = newTotalDebt + getDebtor(id).getTotalDebts();
    double newTotalMoneyOwed = newTotalOwed + getDebtor(id).getTotalAmountOwed();


    contentValues.put(TOTAL_DEBTS, newTotalDebts);
    contentValues.put(TOTAL_OWED, newTotalMoneyOwed);

    return db.update(DEBTOR_TABLE_NAME, contentValues, id, null) > 0;
    //db.close();


}

Any help is welcome.

Answer 1

Finally solved it by changing my update code to this:

public boolean updateRecord(String id,  int newTotalDebt, double newTotalOwed) {

    String filter = DEBTOR_ID +"= '" +id +"'";
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();

    int newTotalDebts = newTotalDebt + getDebtor(id).getTotalDebts();
    double newTotalMoneyOwed = newTotalOwed + getDebtor(id).getTotalAmountOwed();


    contentValues.put(TOTAL_DEBTS, newTotalDebts);
    contentValues.put(TOTAL_OWED, newTotalMoneyOwed);

    return db.update(DEBTOR_TABLE_NAME, contentValues, filter, null) > 0;
    //db.close();


}

Answer 2

在您的DebtDatabaseHandler类函数中，“ public boolean updateRecord（String id，int newTotalDebt，double newTotalOwed）”显示此函数需要三个参数，一个是id，它将是主键，因此您必须提供要更新的行的id。