使用H2数据库(版本1.4.200)我在使用内部窗口函数时遇到了非常奇怪的错误
CTE
。当我将窗口函数字段包含到 CTE
并且 OVER()
子句为空时,它可以正常工作,但是当我尝试在 ORDER BY/PARTITION BY
子句中添加 OVER()
时,我遇到以下错误:'[42000][42000] Syntax error in SQL statement "WITH statement supports only SELECT, TABLE, VALUES, CREATE TABLE, INSERT, UPDATE, MERGE or DELETE statements" '
非工作代码示例:
WITH cte AS(
SELECT ROW_NUMBER() OVER (PARTITION BY CUST_NAME ORDER BY ORDER_DATE) AS rn
FROM TEST.HOLDING
)
SELECT *
FROM cte
一个澄清:当我使用 Windows 函数运行语句时,PARTITION BY\ORDER BY 部分不在
CTE
内,效果很好。
工作代码示例:
SELECT ROW_NUMBER() OVER (PARTITION BY CUST_NAME ORDER BY ORDER_DATE) AS rn
FROM TEST.HOLDING
问题的测试用例:
CREATE TABLE PUBLIC.HOLDING(
CUST_NAME VARCHAR(50),
ORDER_DATE DATE
);
INSERT INTO PUBLIC.HOLDING(CUST_NAME, ORDER_DATE)
VALUES('Customer1',TO_DATE('20200201','YYYYMMDD')),
('Customer1',TO_DATE('20200202','YYYYMMDD')),
('Customer2',TO_DATE('20200201','YYYYMMDD')),
('Customer2',TO_DATE('20200202','YYYYMMDD'));
WITH cte AS(
SELECT CUST_NAME,
ORDER_DATE,
ROW_NUMBER() OVER (PARTITION BY CUST_NAME ORDER BY ORDER_DATE) AS rn
FROM PUBLIC.HOLDING
)
SELECT *
FROM cte;
SELECT CUST_NAME,
ORDER_DATE,
ROW_NUMBER() OVER (PARTITION BY CUST_NAME ORDER BY ORDER_DATE) AS rn
FROM PUBLIC.HOLDING;
如果您想使用像 Partition By/Order By 这样的窗口函数,请使用 #temp 表而不是 CTE。
你应该告诉我们你使用的是哪个数据库。如果你使用sql server,请检查你的代码,我在'with'前面加,是否没有';'。
;WITH cte AS(
SELECT ROW_NUMBER() OVER (PARTITION BY CUST_NAME ORDER BY ORDER_DATE) AS rn
FROM TEST.HOLDING
)
SELECT *
FROM cte;