标签:goal BETWEEN CURRENT window 滑动 date home Sliding ROW
ROWS BETWEEN <start> AND <finish>
PRECEDING: before current row
FOLLOWING: after current row
UNBOUNDED PRECEDING: every row since the beginning
UNBOUNDED FOLLOWING: every rows until the end
CURRENT ROW
例子1
/* Manchester City Home Games */
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';
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
从最早的一条数据,一直到当前的数据
例子2
/* Manchester City Home Games */
SELECT date,
home_goal,
away_goal,
SUM(home_goal)
OVER(ORDER BY date
ROWS BETWEEN 1 PRECEDING
AND CURRENT ROW) AS last2
FROM match
WHERE hometeam_id = 8456
AND season = '2011/2012';
ROWS BETWEEN 1 PRECEDING AND CURRENT ROW
从当前数据的前一条,一直到当前数据
例子3
SELECT
-- Select the date, home goal, and away goals
date,
home_goal,
away_goal,
-- Create a running total and running average of home goals
SUM (home_goal) OVER(ORDER BY date DESC
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) AS running_total,
AVG(home_goal) OVER(ORDER BY date DESC
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) AS running_avg
FROM match
WHERE
awayteam_id = 9908
AND season = '2011/2012';
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
反方向,需要从current row开始算起
标签:goal,BETWEEN,CURRENT,window,滑动,date,home,Sliding,ROW 来源: https://blog.csdn.net/Cecilia_W422/article/details/88608674
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