带WITH的SQL WITH

Question

我想用SQL查询编写一个with。

出错了。 请帮忙：

DECLARE @Start AS DATETIME;
DECLARE @End AS DATETIME;
SET @Start = '2013-04-09';
SET @End = '2013-04-11';
with View_Solidnet_Training as 
(
with View_Solidnet_Training as
(
select  cast(@Start as datetime) DateValue
union all
select DateValue + 1
from View_Solidnet_Training
where DateValue + 1 <= cast(@End as datetime)
)
insert into OBJ_Availability  
select 34, DateValue, 'AM', 2, 'Test' from View_Solidnet_Training;
)
select * from View_Solidnet_Training where PK_Training_ID is not null;

错误：

消息156，第15层，州1，第7行
关键字“ with”附近的语法不正确。
消息319，第15级，州1，第7行
关键字“ with”附近的语法不正确。 如果此语句是公用表表达式或xmlnamespaces子句，则前一条语句必须以分号终止。
Msg 102，第15级，状态1，第17行
'）'附近的语法不正确。

Answer 1

尝试这个。 这只是示例代码。 在此代码中，将CTE与CTE一起编写。

;with CTE1 as (
SELECT Patientid
,Lastname1
,age
,dob
,ROW_NUMBER() OVER (ORDER BY Patientid DESC) AS RowNumber
FROM PTN_PATIENT    
)
,CTE2 AS (
SELECT CTE1.Patientid
,CTE1.Lastname1
,CTE1.age
,CTE1.dob
,CTE1.RowNumber
,DATEDIFF(YEAR,CTE1.dob,GETDATE()) as yearOfservce
FROM Lab_LabDiagOrder INNER JOIN CTE1
ON Lab_LabDiagOrder.Patientid = CTE1.Patientid
WHERE CTE1.RowNumber between 1 and 5
)
SELECT * FROM CTE2;

Answer 2

您不能在CTE（公用表表达式）中包含DECLARE和SET 。

DECLARE @Start AS DATETIME;
DECLARE @End AS DATETIME;
SET @Start = '2013-04-09';
SET @End = '2013-04-11';

;WITH View_Solidnet_Training AS
(
    SELECT @Start AS DateValue

    UNION ALL

    SELECT DateValue + 1
    FROM View_Solidnet_Training
    WHERE DateValue + 1 <= @End 
)
SELECT
    34, DateValue, 'AM', 2, 'Test' 
FROM 
    View_Solidnet_Training
-- WHERE 
--    PK_Training_ID IS NOT NULL

我不知道PK_Training_ID应该来自哪里-在您的代码中找不到它。

笔记：

• 您不能在CTE中使用DECLARE和SET只能是SELECT和UNION ALL
• @Start和@End已经被声明为DATETIME将它们再次强制转换为DATETIME绝对没有意义。
• 对于一个T-SQL语句 ，CTE之后的CTE值立即可用