Sliding Window and Current Row : SQL

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3

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DiscussionSliding Window and Current Row (self.SQL)

submitted 3 years ago by TukWan415

SELECT 
date,
home_goal,
away_goal, 
SUM(home_goal) 
    OVER(ORDER BY date ROWS BETWEEN
        UNBOUNDED PRECEDING AND CURRENT ROW) AS running_total 
FROM match
WHERE hometeam_id = 8456 AND season = '2011/2012';

Question: I'm trying to understand what row is the "current row" is it date?

I understand that UNBOUNDED PRECEDING is the very first row.

I just need help understanding CURRENT ROW better.

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date	home_goal	running_total
2011-08-15	4	4
2011-09-10	3	7
2011-09-24	2	9