在Oracle數據庫中,EXCLUDE是用于在SQL窗口函數中指定窗口中哪些行應該被排除在外的關鍵字??梢耘c其他SQL函數一起使用來篩選出需要的數據。
以下是一些常見的SQL函數,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,可以更靈活地處理窗口函數的結果,并實現更復雜的數據分析和處理需求。