我如何将PERSIST函数添加到排名?
我计划从这段代码创建一个视图,并经常在其上运行子查询。所以当然我不希望排名数根据我运行的子查询而改变。我希望它是一个普通的非公式列。
SELECT a.player_id, a.full_name, a.first_name, a.last_name, d.[rank],
d.column3, a.tournament, c.column5, a.[year], a.[round],
a.score, RANK() OVER (PARTITION BY a.[round] + b.tournament_id + a.
[year] ORDER BY a.score) AS round_leaderboard
FROM df1 AS a JOIN
df2 AS b ON a.tournament = b.tournament JOIN
df3 AS c ON c.[Event] = a.tournament
LEFT JOIN df4 as d
On a.player_id=d.player_id and a.[year]=d.[year]
您可以使用物化视图:
create view myview with schemabinding as
SELECT a.player_id, a.full_name, a.first_name, a.last_name, d.[rank],
d.column3, a.tournament, c.column5, a.[year], a.[round],
a.score,
RANK() OVER (PARTITION BY a.[round] + b.tournament_id + a.[year] ORDER BY a.score) AS round_leaderboard
FROM df1 a JOIN
df2 b
ON a.tournament = b.tournament JOIN
df3 c
ON c.[Event] = a.tournament LEFT JOIN
df4 d
On a.player_id = d.player_id and a.[year] = d.[year];
create index idx_myview_playerid on myview(playerid);
物化视图在documentation中有解释。