在Oracle數(shù)據(jù)庫中,EXCLUDE是用于在SQL窗口函數(shù)中指定窗口中哪些行應(yīng)該被排除在外的關(guān)鍵字??梢耘c其他SQL函數(shù)一起使用來篩選出需要的數(shù)據(jù)。
以下是一些常見的SQL函數(shù),可以與EXCLUDE一起使用:
SELECT
id,
name,
ROW_NUMBER() OVER (ORDER BY id) AS row_num
FROM
table_name
WINDOW
w AS (ORDER BY id EXCLUDE CURRENT ROW)
SELECT
id,
name,
RANK() OVER (ORDER BY id) AS rank_num
FROM
table_name
WINDOW
w AS (ORDER BY id EXCLUDE GROUP)
SELECT
id,
name,
DENSE_RANK() OVER (ORDER BY id) AS dense_rank_num
FROM
table_name
WINDOW
w AS (ORDER BY id EXCLUDE TIES)
SELECT
id,
name,
NTILE(4) OVER (ORDER BY id) AS ntile_num
FROM
table_name
WINDOW
w AS (ORDER BY id EXCLUDE GROUP)
通過組合使用EXCLUDE和其他SQL函數(shù),可以更靈活地處理窗口函數(shù)的結(jié)果,并實(shí)現(xiàn)更復(fù)雜的數(shù)據(jù)分析和處理需求。