在Oracle数据库中,EXCLUDE是用于在SQL窗口函数中指定窗口中哪些行应该被排除在外的关键字。可以与其他SQL函数一起使用来筛选出需要的数据。
以下是一些常见的SQL函数,可以与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)
通过组合使用EXCLUDE和其他SQL函数,可以更灵活地处理窗口函数的结果,并实现更复杂的数据分析和处理需求。