sql - CREATE VIEW 必须是批处理中的唯一语句

Question

我正在尝试发表看法。到目前为止，我已经写了这个：

with ExpAndCheapMedicine(MostMoney, MinMoney) as
(
    select max(unitprice), min(unitprice)
    from Medicine
)
,
findmostexpensive(nameOfExpensive) as
(
    select tradename
    from Medicine, ExpAndCheapMedicine
    where UnitPrice = MostMoney
)
,
findCheapest(nameOfCheapest) as
(
    select tradename
    from Medicine, ExpAndCheapMedicine
    where UnitPrice = MinMoney
)

CREATE VIEW showing
as
select tradename, unitprice, GenericFlag
from Medicine;

不幸的是，我在包含CREATE VIEW showing

“CREATE VIEW 必须是批处理中的唯一语句”

我怎样才能解决这个问题？！

Answer 1

正如错误所说，该CREATE VIEW语句必须是查询批处理中的唯一语句。

在这种情况下，您有两个选择，具体取决于您要实现的功能：

1. 将CREATE VIEW查询放在开头

   CREATE VIEW showing
   as
   select tradename, unitprice, GenericFlag
   from Medicine;
   
   with ExpAndCheapMedicine(MostMoney, MinMoney) as
   (
       select max(unitprice), min(unitprice)
       from Medicine
   )
   ,
   findmostexpensive(nameOfExpensive) as
   (
       select tradename
       from Medicine, ExpAndCheapMedicine
       where UnitPrice = MostMoney
   )
   ,
   findCheapest(nameOfCheapest) as
   (
       select tradename
       from Medicine, ExpAndCheapMedicine
           where UnitPrice = MinMoney
       )
   

2. GO在 CTE 之后和CREATE VIEW查询之前使用

   -- 选项 #2

   with ExpAndCheapMedicine(MostMoney, MinMoney) as
   (
       select max(unitprice), min(unitprice)
       from Medicine
   )
   ,
   findmostexpensive(nameOfExpensive) as
   (
       select tradename
       from Medicine, ExpAndCheapMedicine
       where UnitPrice = MostMoney
   )
   ,
   findCheapest(nameOfCheapest) as
   (
       select tradename
       from Medicine, ExpAndCheapMedicine
       where UnitPrice = MinMoney
   )
   
   GO    
   
   CREATE VIEW showing
   as
   select tradename, unitprice, GenericFlag
   from Medicine;
   

Answer 2

当我试图在同一个语句中创建几个视图时，我遇到了这个问题，对我来说效果很好的是使用动态 SQL。

    EXEC('CREATE VIEW V1 as SELECT * FROM [T1];');
    EXEC('CREATE VIEW V2 as SELECT * FROM [T2];');

Answer 3

您还可以使用：

CREATE VIEW vw_test1 AS SELECT [Name] FROM dbo.test1;
GO
CREATE VIEW vw_test2 AS SELECT [Name] FROM dbo.test2;
GO

--If you need to grant some rights, just use :
GRANT SELECT ON vw_test....

易于理解和避免使用动态 SQL（即使动态 SQL 也可以）