SQL SELECT，CASE，BETWEEN INTO語句

Question

我有一個SQL查詢比較2個表來檢查登錄時間和日程表是否關閉，以便用int值填充第三個表。我得到它的工作，但我試圖添加其他變化到選擇命令。

這裏是工作的代碼：

DECLARE @sqlSelect varchar(max) 
SET @sqlSelect = 'SELECT loginlogout.[Agent Name], case when loginlogout.[Login Time] = Schedules$.StartTime then 0 else 1 end as LoginInc into Integers FROM loginlogout JOIN Schedules$ on loginlogout.[Agent Name] = Schedules$.AgentName' 

EXEC(@sqlSelect) 
GO 

什麼我想補充的是這樣的：

DECLARE @six varchar(max) 
DECLARE @sixo varchar(max) 
DECLARE @sixnerdy varchar(max) 
DECLARE @sqlSelect varchar(max) 
SET @six = '[6:00AM]' 
SET @sixo = '[6:05AM]' 
SET @sixnerdy = '[6:30AM]' 
SET @sqlSelect = 'SELECT loginlogout.[Agent Name], case when loginlogout.[Login Time] = Schedules$.StartTime then 0 when [Login Time] BETWEEN '+ @sixo +' and '+ @sixnerdy +' then 1 else 1 end as LoginInc into Integers FROM loginlogout JOIN Schedules$ on loginlogout.[Agent Name] = Schedules$.AgentName' 

EXEC(@sqlSelect) 
GO 

當運行這個查詢，我得到錯誤味精207無效列名。因此我嘗試過：

SET @sqlSelect = 'SELECT loginlogout.[Agent Name], case when loginlogout.[Login Time] = Schedules$.StartTime then 0 when [Login Time] BETWEEN '+ @sixo +' and '+ @sixnerdy +' then 1 else 1 end as LoginInc into Integers' 

刪除FROM語句。這表示該命令運行，但整數表永遠不會創建。這可以在1個SQL命令中完成嗎？此外，我還需要添加約4個以上的BETWEEN查詢來加強此命令。

Answer 1

由於時間未包含在單引號中，初看一眼就會質疑沒有問題。有這樣的工作嗎？

DECLARE @six varchar(max) 
DECLARE @sixo varchar(max) 
DECLARE @sixnerdy varchar(max) 
DECLARE @sqlSelect varchar(max) 
SET @six = '''6:00AM''' 
SET @sixo = '''6:05AM''' 
SET @sixnerdy = '''6:30AM''' 
SET @sqlSelect = 'SELECT loginlogout.[Agent Name], case when loginlogout.[Login Time] = Schedules$.StartTime then 0 when [Login Time] BETWEEN '+ @sixo +' and '+ @sixnerdy +' then 1 else 1 end as LoginInc into Integers FROM loginlogout JOIN Schedules$ on loginlogout.[Agent Name] = Schedules$.AgentName' 

EXEC(@sqlSelect) 
GO 

雖然這一切似乎仍然有點笨拙。是否有理由EXEC一個SQL字符串vs只是按原樣執行SELECT聲明？