Question

我一直在尝试将以下SQL代码转换为CASE - WHEN到SSIS派生列表达式。该表达式将使用varchar（5）数据类型进入新列。

SQL代码：

CASE
WHEN SUBSTRING(A.Column1,1,5) = 'John'
    OR 
    (C.Column1 IS NOT NULL
    AND A.Column2 = 'Two')
        THEN 'Two'  
WHEN SUBSTRING(A.Column1,1,5) = 'Mike'  
        THEN 'HD' 
WHEN D.Column1 IS NOT NULL
    AND F.Column1 IS NOT NULL
    AND G.Column1 LIKE '%DDD%'
    AND G.Column2 = H.Column1 
    AND H.Column2 = '1'
    AND H.Column3 = 'Y'
    AND H.Column4 <= A.Column3
    AND H.Column5 > A.Column3
    AND H.Column6 <= A.Column3
        THEN 'HE'  
WHEN B.Column1 IS NOT NULL
        THEN '' 
WHEN E.Column1 IS NOT NULL 
        THEN '22' 
ELSE ''

我的表达：

SUBSTRING([A.Column1],1,5) == "John" 
|| (ISNULL([C.Column1]) == FALSE 
&& ([A.Column2] == "Two") ? "Two":

(SUBSTRING([A.Column1],1,5) == "Mike" ? "HD":
(ISNULL([D.Column1]) == FALSE
    && ISNULL([F.Column1]) == FALSE
    && FINDSTRING([G.Column1], "DDD",1) > 0
    && [G.Column2] ==[H.Column1] 
    && [H.Column2] == "1"
    && [H.Column3] == "Y"
    && [H.Column4] <= A.Column3
    && [H.Column5] > A.Column3
    && [H.Column6] <= A.Column3 ? "HE":
(ISNULL([B.Column1]) == FALSE ? "":
(ISNULL([E.Column1]) == FALSE ? "22":""
))))

我是建立表达方式的新手，并且无法找到我出错的地方。我无法下载Expression Tester软件，因为我无法在工作计算机上运行.exe。非常感谢任何帮助。

Answer 1

你在之前缺少一个结束括号吗？＆＃34;两个＆＃34;：

试试这个：

SUBSTRING([A.Column1],1,5) == "John" || (ISNULL([C.Column1]) == FALSE && ([A.Column2] == "Two")) ? "Two": (SUBSTRING([A.Column1],1,5) == "Mike" ? "HD": (ISNULL([D.Column1]) == FALSE && ISNULL([F.Column1]) == FALSE && FINDSTRING([G.Column1], "DDD",1) > 0 && [G.Column2] ==[H.Column1] && [H.Column2] == "1" && [H.Column3] == "Y" && [H.Column4] <= A.Column3 && [H.Column5] > A.Column3 && [H.Column6] <= A.Column3 ? "HE": (ISNULL([B.Column1]) == FALSE ? "": (ISNULL([E.Column1]) == FALSE ? "22":"" ))))

SQL代码CASE..WHEN中的SSIS派生列表达式

1 个答案: