小编Fin*_*eek的帖子

我无法理解为什么CTE不能从WHERE子句中引用 a 。在下面的代码中，第一个查询工作正常，但在第二个查询中，只需用WHERE计算该值的 CTE替换子句中的值，就会产生错误“'where 子句'中的未知列'cte'”。

# This query works

SELECT * FROM stock_prices
WHERE Country_Exchange_Code = 'T' AND Stock_Code IN ('1332');


# But this query produces an error

WITH
    cte AS (SELECT '1332')    
SELECT * FROM stock_prices
WHERE Country_Exchange_Code = 'T' AND Stock_Code IN (cte);


# Here is some data to test these two queries with

CREATE TABLE stock_prices (Country_Exchange_Code VARCHAR(2), Stock_Code VARCHAR(4), Date DATE, Close FLOAT);
INSERT INTO stock_prices VALUES
("T", "1301",   '2019-10-29', …