WITH AS (SELECT) 语句的 CREATE VIEW 语法

Posted 2023-02-26

【中文标题】WITH AS (SELECT) 语句的 CREATE VIEW 语法

【英文标题】：CREATE VIEW syntax for WITH AS (SELECT) statements

【发布时间】：2018-07-11 20:10:17

【问题描述】：

SQL Server：我有以下工作 SQL 语句：

WITH required_skills AS
(
    SELECT DISTINCT 
        e.empl_ID, e.job_code, j.skill_ID, j.skill_desc
    FROM 
        emplskills e
    JOIN 
        jobskills j ON e.job_code = j.job_code
)
SELECT 
    r.empl_ID, e.emplName, r.job_code, r.skill_ID, r.skill_desc
FROM
    required_skills r
FULL OUTER JOIN 
    emplskills e ON r.empl_ID = e.empl_ID
                 AND r.skill_ID = e.skill_ID;

我想将此语句的输出转换为视图。我以为我可以这样做：

CREATE VIEW MY_VIEW 
AS
    (WITH required_skills AS
     (
         SELECT DISTINCT 
             e.empl_ID, e.job_code, j.skill_ID, j.skill_desc
         FROM 
             emplskills e
         JOIN 
             jobskills j ON e.job_code = j.job_code
     )
     SELECT 
         r.empl_ID, e.emplName, r.job_code, r.skill_ID, r.skill_desc
     FROM 
         required_skills r
     FULL OUTER JOIN 
         emplskills e ON r.empl_ID = e.empl_ID AND r.skill_ID = e.skill_ID
);

但它出错了：

“WITH”附近的语法不正确

有人可以帮忙吗？

TIA, 约翰

【参考方案1】：

去掉AS后面的括号

CREATE VIEW MyViewName
AS
WITH required_skills as (
      SELECT DISTINCT e.empl_ID, e.job_code, j.skill_ID, j.skill_desc
     FROM emplskills e
     JOIN jobskills j
       ON e.job_code = j.job_code
)
SELECT r.empl_ID, e.emplName, r.job_code, r.skill_ID, r.skill_desc
  FROM required_skills r
       FULL OUTER JOIN emplskills e
       ON r.empl_ID = e.empl_ID
      AND r.skill_ID = e.skill_ID

【讨论】：

宾果游戏。谢谢楼主！

WITH 必须是批处理中的第一个语句。我通常会尝试确保我的 CTE 以 ; WITH 开头，只是为了确保。

@Shawn 他们不需要成为批处理中的第一条语句。 SELECT 1; WITH CTE AS (SELECT 1 AS I) SELECT I FROM CTE; 会运行良好。您需要做的是在批处理中用分号 (;) 终止上一条语句。分号不是“开始”。

SELECT 1**;**'WITH CTE...`里面有一个分号，以SELECT 1结尾，然后WITH CTE开始。

很高兴它为你工作@JohnJoseph ...一定要标记为答案。