Android SQLite: Update Statement

Question

I need to implement SQLite in my application. I followed this tutorial.. Creating and using databases in Android one

Everything is working fine. I inserted 1 row wit

Answer 1

The SQLiteDatabase object depends on the type of operation on the database.

More information, visit the official website:

https://developer.android.com/training/basics/data-storage/databases.html#UpdateDbRow

It explains how to manipulate consultations on the SQLite database.

INSERT ROW

Gets the data repository in write mode

SQLiteDatabase db = mDbHelper.getWritableDatabase();

Create a new map of values, where column names are the keys

ContentValues values = new ContentValues();
values.put(FeedEntry.COLUMN_NAME_ENTRY_ID, id);
values.put(FeedEntry.COLUMN_NAME_TITLE, title);
values.put(FeedEntry.COLUMN_NAME_CONTENT, content);

Insert the new row, returning the primary key value of the new row

long newRowId;
newRowId = db.insert(
     FeedEntry.TABLE_NAME,
     FeedEntry.COLUMN_NAME_NULLABLE,
     values);

UPDATE ROW

Define 'where' part of query.

String selection = FeedEntry.COLUMN_NAME_ENTRY_ID + " LIKE ?";

Specify arguments in placeholder order.

String[] selectionArgs = { String.valueOf(rowId) };


SQLiteDatabase db = mDbHelper.getReadableDatabase();

New value for one column

ContentValues values = new ContentValues();
values.put(FeedEntry.COLUMN_NAME_TITLE, title);

Which row to update, based on the ID

String selection = FeedEntry.COLUMN_NAME_ENTRY_ID + " LIKE ?";
String[] selectionArgs = { String.valueOf(rowId) };
    int count = db.update(
    FeedReaderDbHelper.FeedEntry.TABLE_NAME,
    values,
    selection,
    selectionArgs);