SQL 错误 无法绑定多部分标识符

Posted 2023-03-31

【中文标题】SQL 错误 无法绑定多部分标识符

【英文标题】：SQL Error The multi-part identifier could not be bound

【发布时间】：2014-09-29 05:16:27

【问题描述】：

当我尝试执行此查询时，我收到“无法绑定多部分标识符“#EachEmployee.ResultID”。”错误。

DECLARE @QueryText VARCHAR(1000) 
SET @QueryText = '
UPDATE #EachEmployee2 
SET #EachEmployee2.CorrectAnswerCount = (
    SELECT COUNT (TMID)
    FROM 
        ' + @WorkDatabaseName + '.dbo.TestBlockTM AS TBTM, 
        ' + @WorkDatabaseName + '.dbo.TestResultTM AS TRTM
    WHERE 1 = 1
          AND TBTM.TMID = TRTM.OtvetID
          AND TBTM.TMPID = TRTM.VoprosID
          AND TRTM.TestResultID = #EachEmployee2.ResultID
    ) 
WHERE
    #EachEmployee2.IsGroup = 0 AND #EachEmployee2.BlockID = 1'
EXECUTE(@QueryText)

但是，类似的查询运行良好：

UPDATE #EachEmployee2 
SET #EachEmployee2.ResultID = (
SELECT TOP 1 TestResultID
FROM #AnswersList AS a
WHERE 1 = 1
      AND a.SID = #EachEmployee2.SID 
      AND a.UserID = #EachEmployee2.UserID
)

有人能说出这里有什么问题吗？感谢并感谢您的帮助。

【参考方案1】：

试试这个

SET @QueryText = '
UPDATE emp
SET emp.CorrectAnswerCount = (
    SELECT COUNT (TMID)
    FROM 
        ' + @WorkDatabaseName + '.dbo.TestBlockTM AS TBTM, 
        ' + @WorkDatabaseName + '.dbo.TestResultTM AS TRTM
    WHERE 1 = 1
          AND TBTM.TMID = TRTM.OtvetID
          AND TBTM.TMPID = TRTM.VoprosID
          AND TRTM.TestResultID = emp.ResultID
    ) 
    From #EachEmployee2 emp
WHERE
    emp.IsGroup = 0 AND emp.BlockID = 1'

【讨论】：

这很有帮助。老实说，我不知道你可以在“UPDATE..SET..”表达式之后使用 FROM。感谢您的帮助。

【参考方案2】：

你能试试这个查询并告诉我错误是否仍然发生：

SET @QueryText = '
UPDATE #EachEmployee2 
SET CorrectAnswerCount = (
    SELECT COUNT (TMID)
    FROM 
        ' + @WorkDatabaseName + '.dbo.TestBlockTM AS TBTM, 
    INNER JOIN ' + @WorkDatabaseName + '.dbo.TestResultTM AS TRTM ON TRTM.OtvetID = TBTM.TMID
                                                                    AND TRTM.VoprosID = TBTM.TMPID
                                                                    AND TRTM.TestResultID = E.ResultID
    ) 
FROM #EachEmployee2 E
WHERE E.IsGroup = 0
    AND E.BlockID = 1'

我添加了FROM 子句并稍微修改了子查询，以便用显式的INNER JOIN 子句替换旧的SQL 语法。

希望这会有所帮助