Question

我试图查看。到目前为止，我写了这个：

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

的行上收到错误消息

＆＃34; CREATE VIEW必须是批次＆＃34;
中的唯一声明

我该如何解决这个问题？！

Answer 1

正如错误所述，CREATE VIEW语句需要是查询批处理中的唯一语句。

在此方案中，您有两个选项，具体取决于您要实现的功能：

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
    )

在CTE之后和GO查询

之前使用CREATE VIEW

- 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

您也可以使用：

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....

很容易理解和避免动态 SQL（即使动态 SQL 也可以）

Answer 3

当我试图在同一条语句中创建几个视图时遇到了这个问题，对我来说，使用动态SQL很好。

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

CREATE VIEW必须是批处理中唯一的语句

3 个答案: