可以通过内线模仿MySQL中的基本CTE
关于此问题已经有各种各样的问题,但我不确定他们是否解决了它的这一特定方面。假设我们对非恢复,非易失性,非剥夺的CTE有以下查询?
WITH tbl AS (
SELECT 1 AS a
) SELECT * FROM tbl
始终将tbl
替换为CTE所指的子选择吗?例如:
SELECT * FROM (SELECT 1 AS a) myCTE
There have been various questions about this but I'm not sure if they address this particular aspect of it. Let's say we have the following query on a non-recursive, non-volatile, non-depdendent CTE?
WITH tbl AS (
SELECT 1 AS a
) SELECT * FROM tbl
Is it possible and valid to always replace tbl
with a sub-select that the CTE refers to? For example:
SELECT * FROM (SELECT 1 AS a) myCTE
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