混合Active Directory查询

Question

我正在尝试创建混合Active Directory / SQL Server表查询。以下是我到目前为止的情况：

declare @openQry varchar(500) = '
(SELECT 
    EC.EmpNo AS [Emp ID]
    ,EC.FirstName AS [First Name]
    ,EC.LastName AS [Last Name]
    ,sAMAccountName AS [AD Username]
    ,EC.KronosUsername AS [Kronos     Username]
FROM OPENQUERY (ADSI,''
    SELECT sAMAccountName
    FROM ''''LDAP://int.chickasaw.net'''' 
    WHERE objectClass = ''''person'''' ''),
    [EnterpriseUtility].[dbo].[Employee_Cache] EC
 WHERE sAMAccountName <> EC.KronosUsername
     AND EC.EmployeeStatus = ''Active''
)'
exec (@openQry)

这是我在尝试执行查询时遇到的错误。

  

Ms 4145，Level 15，State 1，Line 11
  在预期条件的上下文中指定的非布尔类型的表达式，接近＆＃39; Emp＆＃39;。

我将不胜感激。