SQLite (Android) - Selecting Random Row

问题

I have a method to return a Cursor, however it unfortunately spawns a NullPointerException for some reason.

Here's the method, is there anything wrong with it?:

public Cursor getRandom(String tableName) {
        return db.query(tableName + " Order BY RANDOM() LIMIT 1", new String[] {KEY_ID, KEY_TEXT}, null, null, null, null, null);
    }

回答1:

The order by statement is in the wrong place.

SQLiteDatabase.query(String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy, String limit).

Take a look at the API.

来源：https://stackoverflow.com/questions/12270802/sqlite-android-selecting-random-row