sql - CTE 与 DELETE - SQL 数据仓库的替代方案

Question

我想删除表中batchId(运行编号)早于前两行的所有行。我可以在 SQL 数据库中使用以下查询来执行此操作:

WITH CTE AS(
    SELECT
        *,
        DENSE_RANK() OVER(ORDER BY BATCHID DESC) AS RN
    FROM MyTable
)
DELETE FROM CTE WHERE RN>2

但是在 SQL 数据仓库中不允许这样做 this 。在这里寻找替代方案。

Answer 1

您可以尝试使用 JOIN

delete d from MyTable d
join 
(
 SELECT
        *,
        RN = ROW_NUMBER() OVER(PARTITION BY BATCH_ID ORDER BY BATCH_ID DESC)
    FROM MyTable
)A on d.batch_id=A.batch_id where RN >2