Tsql 从列表中在T-SQL中创建一个循环

我有用C#编写的代码，但我想创建一个在服务器上运行的T-SQL脚本。这是我想转换为T-SQL的C#代码的一部分：

var enumerator = distinctlist.GetEnumerator();
    while (enumerator.MoveNext())
    {
        mtbn dtb = enumerator.Current as mtbn;
        var user = users.Where(x => x.Name == dtb.UserNameTb).FirstOrDefault();
        var action = actions.Where(x => x.Name == dtb.ActionTb.Value.ToString()).FirstOrDefault();
        var project = projects.Where(x => x.Name == dtb.ProjectNameTb).FirstOrDefault();
        var transaction = transactions.Where(x => x.Name == dtb.TransactioNameTb).FirstOrDefault();
        TransactBoard transactBoard = dbContext.TransactBoard.Add(new TransactBoard
        {
            User = user != null ? user : new EF.User { Name = dtb.UserNameTb },
            Action = action != null ? action : new EF.Action { Name = dtb.ActionTb.Value.ToString() },
            Project = project != null ? project : new Project { Name = dtb.ProjectNameTb, Path = @"S:\\xxxx\\" + dtb.ProjectNameTb },
            Transaction = transaction != null ? transaction : new Transaction { Name = dtb.TransactioNameTb },
            DateTime = dtb.WriteDateTimeTb.Value
        });
        dbContext.MonitorControl.Add(
        new MonitorControl
        {
            ElementId = dtb.ElementIdTb.Value,
            Category = category.Where(x => x.Id == dtb.CategoryIdTb).FirstOrDefault(),
            TransactBoard = transactBoard
        });
    }

这就是我在T-SQL上所做的：

begin tran            
    insert dbo.TransactionBoard(TrancationId, UserId, ActionId, ProjectId, [DateTime] )
    select t.Id as TrancationId, u.Id as UserId, s.ActionTb, p.Id as ProjectId, s.WriteDateTimeTb
    from monitorControlDb.dbo.MonitorlControlTable s
        left join dbo.[Transaction] t
        on t.[Name] = s.TransactioNameTb 
        left join dbo.[User] u
        on u.[Name] = s.UserNameTb 
        left join dbo.Project p
        on p.[Name] = s.ProjectNameTb
    insert dbo.MonitorControl(ElementId, CategoryId)
    select s.ElementIdTb, s.CategoryIdTb
    from monitorControlDb.dbo.MonitorlControlTable s   
commit

---

您有SQL探查器（SSMS）吗？您可以使用它来收集LINQ发送到DB的查询吗？它会给你一些好的提示，让你更容易找到答案。如何在tsql中实现一个循环？实际上，你的SQL看起来很完美。它将自动循环遍历结果集（来自SELECT语句）并插入所有行。你试过了吗？结果是什么？我已经运行了三次脚本，之后TransactionId再也不会出现在MonitorControl中，即使TransactionBoard有一个标识（1,1）和MonitorControls的约束，当您只运行select语句（没有INSERT）时会得到什么？如

从monitorControlDb.dbo.MonitorControlTable s中选择s.ElementIdTb、s.CategoryIdTb

可能

monitorControlDb.dbo。MonitorControlTable

为空