Question

请参阅我先前的问题here-在SQL Server Management Studio中执行时效果很好，当我尝试在C＃中执行时，我一直得到A TOP N或FETCH行计数值可能不是负错误。实体框架的代码。我使用的代码是；

    var sDate = "20180925"; // DateTime.Now.AddMonths(NoOfMonthsBack).ToString("yyyyMMdd");
    var eDate = "20180101"; //DateTime.Now.ToString("yyyyMMdd");


var result =  ctx.Database.ExecuteSqlCommand("; WITH d(d) AS ( SELECT DATEADD(MONTH, n, DATEADD(MONTH, DATEDIFF(MONTH, 0, @StartDate), 0)) " +
                                              "FROM ( SELECT TOP (DATEDIFF(MONTH, @StartDate, @EndDate) + 1) n = ROW_NUMBER() OVER (ORDER BY [object_id]) - 1 FROM sys.all_objects " +
                                              "ORDER BY [object_id] ) AS n ) SELECT [Period] = CONVERT(VARCHAR(4), YEAR(d.d)) + '-' + CONVERT(VARCHAR(2), MONTH(d.d)), QtyTotal = ISNULL(SUM(o.QEXIT),0) " +
                                              "FROM d LEFT OUTER JOIN VE_STOCKTRANS AS o ON o.TRANSDATE >= d.d and STOCKID = @pID AND TRANSTYPE = @TransType AND o.TRANSDATE < DATEADD(MONTH, 1, d.d) " +
                                              "GROUP BY d.d ORDER BY d.d;",
                                              new SqlParameter("@StartDate", sDate),
                                              new SqlParameter("@EndDate", eDate),
                                              new SqlParameter("@pID", pID),
                                              new SqlParameter("@TransType", transType));

如果有经验的人可以向我展示正确的方向以解决此问题，我将不胜感激。

谢谢。

Answer 1

SELECT TOP (DATEDIFF(MONTH, @StartDate, @EndDate) + 1)给出了否定的答案，或者有可能这样做

用abs()括起来以确保为正数：

SELECT TOP abs(DATEDIFF(MONTH, @StartDate, @EndDate)) + 1

Answer 2

看起来NoOfMonthsBack是一个正值（例如int或float）。如果您的目标是回到过去，则应否定使用它。在第一行的注释中：

var sDate = DateTime.Now.AddMonths(-NoOfMonthsBack).ToString("yyyyMMdd");

如何解决：“ TOP N或FETCH行计数值不能为负”

2 个答案: