在WHERE IN子句中使用SELECT語句，即WHERE blah in（SELECT b ...）

[英]Using a SELECT Statement in the WHERE IN Clause i.e. WHERE blah in (SELECT b…)

本文翻译自 Mark Ellul 查看原文 2009-02-14 493 pivot/ sql-server-2005

I am trying to do some complex pivot query... and I need to do a select in the IN Clause...

我正在嘗試做一些復雜的數據透視查詢......我需要在IN子句中做一個選擇...

樞軸的示例

Looking at the Example in the above link, you can see they use the employee ids explicitly in their pivot. I would like to be able to do select instead of specifying the employee ids.

查看上面鏈接中的示例,您可以看到他們在其數據透視中明確使用了員工ID。我希望能夠選擇而不是指定員工ID。

The only way I can think of doing it now, is by creating my pivot query in a string and using manipulation in a Stored Prodcedure to build the employee ids into a string, insert that into my PIVOT clause, and execute the resulting SQL....

我現在想到的唯一方法是在字符串中創建我的數據透視查詢,並在Stored Prodcedure中使用操作將員工ID構建到字符串中,將其插入到我的PIVOT子句中,然后執行生成的SQL。 ..

Anyone think of a better way to do this?

有人想過更好的方法嗎?

1 个解决方案

#1

You pretty much have to use dynamic SQL when construction pivot queries when the pivot column contents cannot be hard coded.

當樞軸列內容無法進行硬編碼時,您在構造數據透視查詢時幾乎必須使用動態SQL。

注意！

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