sql - 多次提示用户输入相同的查询参数 (MS-Access)

Question

我有一个参数查询，它根据用户输入的开始日期和今天的日期从我的表中选择信息。我想使用 WHERE 语句在我的表中搜索两个字段，而无需两次输入开始日期的提示。现在我有:

SELECT PatientSurvey.PatientID
FROM PatientSurvey
WHERE (PatientSurvey.[6MonthSurveyReturn] OR PatientSurvey.[12MonthSurveyReturn]) Between [Enter the last date checked for:] And Date();

这似乎不起作用。但是，如果我执行以下操作:

SELECT PatientSurvey.PatientID
FROM PatientSurvey
WHERE (PatientSurvey.[6MonthSurveyReturn]) Between [Enter the last date checked for:] And Date() OR (PatientSurvey.[12MonthSurveyReturn]) Between [Enter the last date checked for:] And Date();

然后它会针对相同的输入提示用户两次。 如何防止这种情况发生？

Answer 1

将 PARAMETERS 声明添加到您的查询中。

PARAMETERS [Enter the last date checked for:] DateTime;
SELECT PatientSurvey.PatientID
FROM PatientSurvey
WHERE
       (([PatientSurvey].[6MonthSurveyReturn]) Between [Enter the last date checked for:] And Date())
    OR (([PatientSurvey].[12MonthSurveyReturn]) Between [Enter the last date checked for:] And Date());