我有一个包含此数据的表 MOVIE。
MOVIE_ID MOVIE_TITLE CATEGORY SALES_AMT
--------- ------------------------ --------------- ----------
M_0000004 The Boss Baby Animation 2000
M_0000006 Star Wars: The Last Jedi Science Fiction 3000
M_0000007 Get Out Horror 4000
M_0000008 Million Dollar Arm Action 2000
M_0000009 The Conjuring Horror 1000
M_0000012 The Dark Knight Action 3000
我需要基于以下内容的热门电影数据SALES_AMT
关于CATEGORY
需要的结果是这样的:
MOVIE_ID MOVIE_TITLE CATEGORY SALES_AMT
--------- ------------------------ --------------- ----------
M_0000004 The Boss Baby Animation 2000
M_0000006 Star Wars: The Last Jedi Science Fiction 3000
M_0000007 Get Out Horror 4000
M_0000012 The Dark Knight Action 3000
如果我使用 GROUP_BY 选项,我无法选择MOVIE_ID
and MOVIE_TITLE
select CATEGORY, MAX(SALES_AMT)
from MOVIE
group by CATEGORY
;
尝试使用分析函数和子查询
select movie_id, movie_title, category, sales_amt
from (
select movie_id, movie_title, category, sales_amt,
row_number() over (partition by category order by sales_amt desc) r
from movie
) where r = 1
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