如何更新我的sqlite数据库中的值？

Question

Here's the sql query I want to run:

 Cursor cursor = sqLiteDatabase.rawQuery("UPDATE collection SET datetime=\""  + (newDate) + "\"" + " WHERE region =" + region, null);

But what am I supposed to do with the cursor to call this query to update my database?

Answer 1

Use sqLiteDatabase.execSQL() instead. rawQuery is used with SELECT operation

String updateQuery = "UPDATE collection SET datetime= '"  + (newDate) + "' WHERE region = '" + region;
                    sqLiteDatabase.execSQL(updateQuery);

Answer 2

for updating database:

SQLiteDatabase sqLiteDatabase= this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put("datetime", newDate);

    // updating row
    // if region is string! otherwise convert it into string

    sqLiteDatabase.update(collection, values, "region" + " = ?",
            new String[] { region });