Question

我使用下面的sql查询从SQL db中将一些数据提取到Excel，然后在excel中我添加了两个附加列，其中各自的公式如下所示进行分析。现在我试图将这些excel公式添加到我的sql查询本身作为2列，我遇到了麻烦，请你建议我如何将上述两个公式添加到我的sql查询中。

非常感谢提前。

大于2个月的公式= IF（LastAccessDate＆gt; TODAY（） - （365/6），“”，“超过2个月”）
持续时间检查公式= IF（LastAccessDate-FirstAccessedDate = 0，“从不登录“，LastAccessDate-FirstAccessedDate”

Sql Query：

SELECT s.DomainName as UserId
,s.fullname as FullName
,MIN(DATEADD(HH,DATEDIFF(HH,GetUTCDate(),GetDate())), A.CreatedOn)) [FirstAccessAt]
,MAX(DATEADD(HH,(DATEDIFF(HH,GetUTCDate(),GetDate())),A.CreatedOn)) [LastAccessAt]

--Tried on my own
    --,DATEPART(MM,DATEADD(HH,(DATEDIFF(HH,GetUTCDate(),GetDate())), A.CreatedOn))AS [Month]
    --,(MAX(DATEADD(HH,(DATEDIFF(HH,GetUTCDate(),GetDate())), A.CreatedOn))> -6, GETDATE())  [OlderThan6Months]

    FROM archive a
    INNER JOIN Systemuser s
    ON s.systemuserid = a.objectid
    WHERE a.action = 54
    and a.CreatedOn between '2015-05-22 00:00:00.000' and '2016-11-23 00:00:00.000'
    GROUP BY s.FullName,s.DomainName --DATEPART(MM,DATEADD(HH,(DATEDIFF(HH,GetUTCDate(),GetDate())), A.CreatedOn))
    ORDER BY [LastAccessAt] desc

Answer 1

试试这个：

DECLARE @FirstAccessDate DATETIME;
DECLARE @LastAccessDate DATETIME;
DECLARE @Today DATETIME;

SET @FirstAccessDate = '20160920';
SET @LastAccessDate = '20160922';
SET @Today = '20161122';

SELECT  CASE WHEN DATEADD(MONTH, 2, @LastAccessDate) >= @Today THEN NULL
             ELSE 'Older than 2 months'
        END AS IsOlderThanTwoMonths,
        CASE WHEN @FirstAccessDate = @LastAccessDate THEN 'Never Logged On'
             ELSE CAST(DATEDIFF(DAY, @FirstAccessDate, @LastAccessDate) AS VARCHAR(20))
        END AS Duration; 

SET @LastAccessDate = '20160921';       
SET @FirstAccessDate = '20160921';

SELECT  CASE WHEN DATEADD(MONTH, 2, @LastAccessDate) >= @Today THEN NULL
             ELSE 'Older than 2 months'
        END AS IsOlderThanTwoMonths ,
        CASE WHEN @FirstAccessDate = @LastAccessDate THEN 'Never Logged On'
             ELSE CAST(DATEDIFF(DAY, @FirstAccessDate, @LastAccessDate) AS VARCHAR(20))
        END AS Duration;

所以你的查询应该是这样的：

SELECT
    UserId,
    FullName,
    FirstAccessAt,
    LastAccessAt,
    CASE WHEN DATEADD(MONTH, 2, LastAccessAt) >= @Today THEN NULL
            ELSE 'Older than 2 months'
    END AS IsOlderThanTwoMonths,
    CASE WHEN FirstAccessAt = LastAccessAt THEN 'Never Logged On'
            ELSE CAST(DATEDIFF(DAY, FirstAccessAt, LastAccessAt) AS VARCHAR(20))
    END AS Duration
FROM (
        SELECT
            s.DomainName as UserId,
            s.fullname as FullName,
            MIN(A.CreatedOn) AS FirstAccessAt,
            MAX(A.CreatedOn) AS LastAccessAt
        FROM archive a
        INNER JOIN Systemuser s
            ON s.systemuserid = a.objectid
        WHERE
            a.action = 54
        and a.CreatedOn between '2015-05-22 00:00:00.000' and '2016-11-23 00:00:00.000'
        GROUP BY
            s.FullName, s.DomainName
        ) t
ORDER BY LastAccessAt DESC

Answer 2

1。超过2个月的公式= IF（LastAccessDate＆gt; TODAY（） - （365/6），＆＃34;＆＃34;，＆＃34;超过2个月＆＃34;）

在TSQL中：

DateDiff（月，LastAccessDate，GetDate（））＆gt; 2时的情况那么＆＃39;年龄超过2个月＆＃39; ELSE NULL END AS ColumnName

2。持续时间检查公式= IF（LastAccessDate-FirstAccessedDate = 0，＆＃34;从未登录＆＃34;，LastAccessDate-FirstAccessedDate）

在TSQL中：

CASE WHEN（LastAccessDate-FirstAccessDate）= 0 然后，永远不会登录＆＃39; ELSE（LastAccessDate-FirstAccessDate） END AS ColumnName

Answer 3

是的，只需在两个语句之间添加一个逗号并替换即可 '列名' 具有独特的名称。

如何将Excel公式转换/模拟为SQL查询

3 个答案: