具有子查询分解的 Oracle DELETE 语句

Question

尝试执行此操作(适用于 SQL Server):

WITH X AS (), Y AS (), Z AS ()
DELETE FROM TBL
WHERE TBL.ID IN (SELECT ID FROM Z);

这在 Oracle 中有效:

WITH X AS (), Y AS (), Z AS ()
SELECT * FROM TBL
WHERE TBL.ID IN (SELECT ID FROM Z);

但 DELETE 没有:ORA-00928:缺少 SELECT 关键字

我的子查询相当大，是否有不同的语法可以使其工作？

Answer 1

除了 SELECT 语句之外，您不能将子查询分解/CTE 与任何其他语句一起使用。 From the documentation:

You can specify this clause in any top-level SELECT statement and in most types of subqueries.

你可以这样做:

DELETE FROM tbl WHERE tbl.id IN
(WITH X AS (), Y AS (), Z AS ()
SELECT id FROM TBL
 WHERE TBL.ID IN (SELECT ID FROM Z));