Question

您好，

如果我在我的数据库中运行：

SELECT *
FROM 
    Ads AS a 
INNER JOIN AdCategories AS ac 
    on (ac.Id = a.CategoryId) 
INNER JOIN Location AS l 
    on (l.Id = a.UserLocationId) 
WHERE 
    (l.LevelOrder LIKE '2/3/5/%') AND 
    (a.Title LIKE '%' OR a.Description LIKE '%') AND 
    a.InactivatedDate IS NULL AND 
    a.PublishedDate IS NOT NULL AND 
    a.EndDate >= '2012-02-04 17:01:37' AND 
    a.EndDate >= '2011-11-04 16:55:26' AND 
    ac.LevelOrder Like '7/15/33/36_%'

这将返回2行，但在使用Entity Framework

运行相同的命令时

context.CreateQuery<Ad>(sqlCommand, parameters.ToArray()); 
output = ads.ToList();

我一无所获？

这就是SQL语句的样子：

SELECT VALUE a 
FROM 
    Ads AS a 
INNER JOIN AdCategories AS ac 
    on (ac.Id = a.CategoryId) 
INNER JOIN Location AS l 
    on (l.Id = a.UserLocationId) 
WHERE 
    (l.LevelOrder LIKE @locationLevelOrder0) AND 
    (a.Title LIKE @searchS OR a.Description LIKE @searchS) AND 
    a.InactivatedDate IS NULL AND 
    a.PublishedDate IS NOT NULL AND 
    a.EndDate >= @CurrentTime AND 
    a.EndDate >= @fetchAdsTo AND 
    ac.LevelOrder Like @categoryLevelOrder

参数如下所示：

LocationLevelOrder0 = 2/3/5/%
searchS = %
CurrentTime = {2012-02-04 17:31:34}
fetchAdsTo = {2011-11-04 17:31:34}
categoryLevelOrder = 7/15/33/36/_%

为什么我在SQL管理器中没有使用Entity Framework获得任何结果？选择价值代表什么？如果我删除它将会抛出异常？

Answer 1

首先在查询中将LevelOrder与'7/15/33/36_%'进行比较，在第二个中将7/15/33/36/_%与另一个字符串进行比较。这是转录错误还是问题？

SQL命令有效，但与EntityFramework相同的命令不起作用？

1 个答案: