Sql 如何将“Hosts”添加为单独的行，而不管信息是否显示在与用户相同的表中

在我们的数据库结构中，我们有用户。此表中说明了用户是否为主机。这是通过“IsHost”布尔值字段实现的。我想运行一个查询，在一行中显示不是主机的用户访问者，在另一行中显示访问主机的名称

我将复制查询的“选择”和“从”部分以帮助您

SELECT  [User].FirstName + [User].LastName AS 'Visitors Name',
        User.FirstName + User.LastName AS 'Host Name',
        Company.Name AS 'Company Name',
        VUT.AutoCheckoutTime, 
        VUD.ExpectedTime AS 'Expected Time on Site'
FROM  [User] 
INNER JOIN VisitUser ON [User].UserId = VisitUser.UserId 
INNER JOIN Visit ON VisitUser.VisitId = Visit.VisitId 
INNER JOIN VisitUserType VUT ON [User].DefaultVisitUserTypeId = VUT.VisitUserTypeId 
                            AND VisitUser.VisitUserTypeId = VUT.VisitUserTypeId 
INNER JOIN VisitUserDate VUD ON VisitUser.VisitUserId = VUD.VisitUserId 
LEFT OUTER JOIN Company ON [User].CompanyId = Company.CompanyId

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好吧，记得怎么做了。补充 hostuser.FirstName+“”+hostuser.lastname[主主机]，选择并

Visituser hostvisituser on Visit.VisitId = hostvisituser.VisitId 
                        and hostvisituser.IsMainHost = 1             
LEFT JOIN [User] hostuser on hostvisituser.UserId = hostuser.UserId 

来自。如果有人看了，干杯