匹配Sql Table中兩列的值並將其保存到另一列

我正在製作一個工具，它可以從表列中選擇UCPost值，並將其與同一表的UCPre匹配，並將其插入其他所有細節的表中。匹配Sql Table中兩列的值並將其保存到另一列

表：

**UCID UCName  Author  UCPre       UCPost** 
    UC01 Login  Bilal Haider User must be Registerd   User is Loggined sucessfully 
    UC02 Add User Bilal Haider User is Loggined sucessfully User is added 
    UC03 Add file Bilal Haider User is Loggined sucessfully File added 
    UC04 Delete file Bilal Haider File is selected    File is deleted

從這個表我選擇 UCID UCPre UCPost 並插入到另一個表名稱測試

**UCId UCPre       UCPost       UCNext** 
UC01 User must be Registerd   User is Loggined sucessfully NULL 
UC02 User is Loggined sucessfully User is added     NULL 
UC03 File must be selected   File is added     NULL 
UC04 File is selected    File is deleted     NULL 
UC05 User is Loggined sucessfully User is deleted     NULL

我要填寫測試表的UCNext列與UCPre與所選用例的UCPost相匹配的用例的UCId。

與UC01一樣UCPost是用戶在執行查詢時成功登錄，它與UC01的UCPost與所有用例的UCPre相匹配，而UC02和UC03具有相同的UCPre，因此UCNext必須填充UC02，UC03但發生錯誤。

問題： 當我嘗試執行以下語句

更新測試集UCNext =（從UCDetails選擇UCID其中test.UCPost = UCPre）

它給下面的錯誤

Msg 512, Level 16, State 1, Line 1 
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression. 
The statement has been terminated.

請告訴我如何解決這個問題。

來源

2015-02-06 BILAL HAIDER

test.UCPost =User is Loggined sucessfully從測試表中有不止一行UCDetails那就是你爲什麼得到那個錯誤。試試這個

UPDATE A 
SET a.UCNext = b.UCId 
FROM test a 
     JOIN UCDetails b 
     ON A.UCPost = b.UCPre

來源

2015-02-06 18:03:45

尊敬它得到只一個值。是有什麼我可以全部UCIDs與UCPre單UCNext比賽機會呢？ – 2015-02-06 18:24:40

親愛的，它只能得到一個值。有沒有機會讓我可以在單個UCNext中與UCPre匹配的所有UCID？ – 2015-02-07 11:29:40

匹配Sql Table中兩列的值並將其保存到另一列

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