Question

您好我正在使用crystal并希望添加一个名为Group 1的公式字段，并希望使用这样的SQL查询：

CASE '{?Group 1}'                   
            WHEN 'Location' THEN (CASE WHEN COALESCE(TABLE_NAME_1.COLUMN_NAME_1, TABLE_NAME_1.COLUMN_NAME_2) IS NULL THEN '*Unspecified Location'
                WHEN TABLE_NAME_2.COLUMN_NAME_1 IS NULL THEN CONCAT('*Unknown Location', CONCAT(' [',CONCAT(COALESCE(TABLE_NAME_1.COLUMN_NAME_1, TABLE_NAME_1.COLUMN_NAME_2),']')))
                WHEN TABLE_NAME_2.COLUMN_NAME_2 IS NULL THEN CONCAT('*Unnamed Location', CONCAT(' [',CONCAT(TABLE_NAME_2.COLUMN_NAME_1,']')))
                ELSE TABLE_NAME_2.COLUMN_NAME_2 END)                        
            ELSE NULL END GROUP_1

不完全确定这是如何转化为水晶的。任何帮助都会很棒。谢谢

好的，我重新设计了公式并提出了：

IF {?Group1} = "Location" THEN
    IF ISNULL({TABLE_NAME_1.COLUMN_NAME_1}) THEN "*Unspecified Location" ELSE
    IF ISNULL({TABLE_NAME_1.COLUMN_NAME_2}) THEN "*Unspecified Location" ELSE
    IF ISNULL({TABLE_NAME_2.COLUMN_NAME_1}) THEN "*Unknown Location" ELSE
    IF ISNULL({TABLE_NAME_2.COLUMN_NAME_2}) THEN "*Unnamed Location"
            ELSE {TABLE_NAME_2.COLUMN_NAME_2}

我认为这可能有效。你同意还是有更好的方法？

Answer 1

您的转化几乎正确，需要进行以下检查。

        IF {?Group1} = "Location" THEN
        (
            IF (ISNULL({TABLE_NAME_1.COLUMN_NAME_1}) or ISNULL({TABLE_NAME_1.COLUMN_NAME_2})) 
    THEN "*Unspecified Location" 
        ELSE IF ISNULL({TABLE_NAME_2.COLUMN_NAME_1}) 
        THEN "*Unknown Location " &IIF((ISNULL({TABLE_NAME_1.COLUMN_NAME_1}) or ISNULL({TABLE_NAME_1.COLUMN_NAME_2})),{TABLE_NAME_1.COLUMN_NAME_1},{TABLE_NAME_1.COLUMN_NAME_2})
        ELSE IF ISNULL({TABLE_NAME_2.COLUMN_NAME_2}) 
THEN "*Unnamed Location " & {TABLE_NAME_2.COLUMN_NAME_1}
        )
                    ELSE {TABLE_NAME_2.COLUMN_NAME_2}

将SQL引入水晶公式字段

1 个答案: