sql-server - ColdFusion MsSQL HAVING SUM() 与 NULL 值

Question

我用 CF 9 和 MsSQL 2005 对此进行了测试

CREATE TABLE HAVING_SUM
(
    A_VARCHAR VARCHAR(5),
    B_INT INT
)

INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'AB', 2 )
INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'AB', 3 )
INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'AB', 5 )
INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'CD', 2 )
INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'CD', 7 )
INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'CD', 8 )
INSERT INTO HAVING_SUM ( A_VARCHAR, B_INT ) VALUES ( 'CD', NULL)

然后在 Ms SQL Server Management Studio Express 中查询

SELECT  *
FROM    HAVING_SUM

SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR

SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
HAVING SUM(B_INT) = 10

SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
HAVING SUM(B_INT) = 10.5

结果是

然后我尝试使用 cfquery

<cfquery name="qryHavingSum_1">
SELECT  *
FROM    HAVING_SUM
</cfquery>

<cfdump var="#qryHavingSum_1#">

<cfquery name="qryHavingSum_2">
SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
</cfquery>

<cfdump var="#qryHavingSum_2#">

<cfquery name="qryHavingSum_3">
SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
HAVING SUM(B_INT) = 10
</cfquery>

<cfdump var="#qryHavingSum_3#">

<cfquery name="qryHavingSum_4">
SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
HAVING SUM(B_INT) = 10.5
</cfquery>

<cfdump var="#qryHavingSum_4#">

结果是

编辑（从这里开始）：向下滚动到调试器我有这个

该红色区域表示 qryHavingSum_4 已执行，记录为 0，但在Exception部分中 qryHavingSum_4 未定义（<cfdump var="#qryHavingSum_4#">） 编辑（到此结束）

如果我将 qryHavingSum_4 更改为

<cfquery name="qryHavingSum_4">
SELECT  A_VARCHAR,
        SUM(ISNULL(B_INT, 0)) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
HAVING SUM(ISNULL(B_INT, 0)) = 10.5
</cfquery>

结果是

然后我尝试使用其他运算符更改SUM(B_INT)（不带 ISNULL）和（不带 ISNULL）并且它有效。HAVING SUM(B_INT)> >= < <= <> !=

为什么我不能=在 CF 中使用上面的 with 查询？是CFbugs吗？

谢谢你

Answer 1

Management Studio 去除空值（当您运行它时，检查消息选项卡，您将看到以下内容）

Warning: Null value is eliminated by an aggregate or other SET operation.

Coldfusion mssql 驱动程序没有。

使用 isnull 函数是最好的方法。

或者，您可以在 cfquery 中禁用 ansi 警告并在它们运行后重新启用它们因此您可以将查询 4 ​​更改为

SET ANSI_WARNINGS OFF
SELECT  A_VARCHAR,
        SUM(B_INT) AS B_INT
FROM    HAVING_SUM
GROUP BY A_VARCHAR
HAVING SUM(B_INT)=10.5
SET ANSI_WARNINGS ON