SQL中的CASE WHEN使用 Case具有两种格式。简单Case函数和Case搜索函数。...如果使用Case函数,SQL代码如下: SELECT SUM(population), CASE country WHEN ‘中国’ THEN ‘亚洲’ WHEN ‘印度’ THEN ‘...但是那样增加消...
OR ） CASE WHEN sex = ‘1’ THEN ‘男’ WHEN sex = ‘2’ THEN ‘女’ ELSE ‘其他’ END...
当然,以下是关于在Microsoft Access中使用CASE WHEN语句的详细文档。需要注意的是,Access SQL并不直接支持标准的SQL CASE WHEN语法用于查询结果中的条件逻辑(如在T-SQL或PL/pgSQL中)。然而,你可以通过其他方法实现类似的功能,比如使用IIf函数或在VBA中实现更复杂的逻辑。 在查询设计视图中使用IIf函数模拟CASE WHEN 虽...
49. Access的字符串函数不光可以在查询数据库的语句内部使用,也可以在VBA中直接使用。 24、Access里列别名必须使用As进行标记,SQLServer则可要可不要;表的别名则都是可用可不用。 25、Access的NOT IN速度慢 在通过VBA的JET引擎调用Access语法时,NOT IN速度非常慢,上千行的数据可能就需要好几分钟。替代方法是: SE...
开发语言 主题 消除警报 本文原文为英文,已针对你所在市场进行了翻译。 你对所用语言的质量的满意度如何? 请告诉我们 搜索 Office VBA 参考 Access 概述 概念 对象模型 概述 AccessObject 对象 AccessObjectProperty 对象 AccessObjectProperties 对象 AdditionalData 对象 ...
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For example, suppose that you have created a form and a report, and you want to add a command button to the form that, when clicked, opens the report. Programming, in this case, is the process of creating a macro or VBA procedure and then setting the command button's OnClick event ...
Normally, when you type an identifier that already exists in the table, the VBA editor "corrects" the lettercase of your entry to match the table's entry. The extremely annoying part is that sometimes that last step works in reverse. You type an existing identifier, but with a different ...
Type MyID: NewCDec([CategoryID]) in the Field row of a query. When you run this function, it returns a valid value for the MyID field. Status Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. ...
To import forms and reports that contain VBA code (and also modules), first convert your Access 2.0 or Access 95 database to the Access 2002 - 2003 or Access 2000 file format by using Microsoft Office Access 2003, Access 2002, or Access 2000. You can then use...