ms访问语法错误列规范无效（＃0）

Question

我正在进行两个查询的联合。

查询单独运行时没有问题，但联合会抛出此查询。有任何想法吗？

查询

SELECT CStr（[REFERENCE]）AS CostID，CSng（[RATE]）AS HRates FROM [Qry 1项目预算pt1人工费率] UNION ALL SELECT CStr（[REFERENCE]），CSng（[Rate]）FROM [Qry 1 Project Budget pt2 3rd party];

访问2007

Answer 1

CStr()和CSng()都会在Null中引发错误。检查您的[REFERENCE]和[RATE]值是否为空。

SELECT
    [REFERENCE],
    [RATE]
FROM [Qry 1 Project Budget pt1 labour rates]
WHERE [REFERENCE] Is Null OR [RATE] Is Null
UNION ALL
SELECT
    [REFERENCE],
    [Rate]
FROM [Qry 1 Project Budget pt2 3rd party]
WHERE [REFERENCE] Is Null OR [RATE] Is Null;