SQL Server-关键字“AS”附近的语法不正确

这是我的密码

WITH cte AS
(
    SELECT 
        nr_CRM,
        CLASSIFIC,
        COUNT(*) OVER (PARTITION BY nr_CRM) AS total_cnt
    FROM tmp_usr..tb
)
SELECT
    COUNT(DISTINCT(nr_CRM) AS CRM_total
FROM 
    cte
WHERE 
    total_cnt = 3
    AND CLASSIFIC = 'GOLD'
    AND dt_Visita >= '2021-01-25' AND dt_Visita <= '2021-02-26'

它是在SQLite上编写的，但现在我需要使用SQLServer，它无法工作

第10行显示以下错误：

关键字“AS”附近的语法不正确

---

如何调整它？

有一个额外的左括号：

WITH cte AS (
    SELECT
        nr_CRM,
        CLASSIFIC,
        COUNT(*) OVER (PARTITION BY nr_CRM) as total_cnt
    FROM tmp_usr..tb
)
SELECT
    COUNT(DISTINCT nr_CRM) AS CRM_total -- <-- here
    FROM cte
    WHERE
      total_cnt = 3
      AND CLASSIFIC = 'GOLD'
      AND dt_Visita >= '2021-01-25'
      and dt_Visita <= '2021-02-26'

DISTINCT不是一个函数，它是一个运算符；它后面没有括号。DISTINCT是一个。