'CREATE VIEW'必须是查询批处理中的第一个语句

Posted 2021-04-02

基本上它的标题是什么。这是我的代码。

USE Assignment2;
GO

/* Player View (2 marks)
    Create a view which shows the following details of all players:
        • The ID number of the player
        • The first name and surname of the player concatenated and given an alias of “full_name”
        • The team ID number of the player (if applicable)
        • The team name of the player (if applicable)
        • The coach ID number of the player (if applicable)
        • The name of the player’s coach (if applicable)

   Creating this view requires a select statement using multiple joins and concatenation of names.  
   Make sure that you use the appropriate type of join to ensure that players without teams or coaches are still included in the results.

*/


-- Write your Player View here
PRINT 'Creating Player View'

CREATE VIEW playerView AS 
SELECT player.id, player.firstName + ' ' + player.surname AS 'Full name', player.team, team.name, player.coach, coach.firstName, coach.surname 
FROM player
LEFT OUTER JOIN team
    ON player.team = team.id
    LEFT OUTER JOIN player as coach
        ON player.coach = coach.id;



GO
/* Race View (3 marks)
   Create a view which shows the following details of all races:
        • All of the columns in the race table
        • The name of the race type, course and team involved in the race
        • The full name of the player observing the race and the full name of the MVP (if applicable)
        • A calculated column with an alias of “unpenalised_score”, which adds the points penalised to the final score

   Creating this view requires a select statement using multiple joins and concatenation of names.  
   Make sure that you use the appropriate type of join to ensure that races without MVPs are still included in the results.
*/

-- Write your Race View here
PRINT 'Creating Race View'

CREATE VIEW raceView AS 
SELECT race.id, race.dateOfRace, race.raceType, raceType.name AS raceTypeName, race.course, course.name AS courseName, race.team, team.name AS teamName, race.observer, obs.firstName + ' ' + obs.surname AS observer_name, race.mvp, mvp.firstName + ' ' + mvp.surname AS mvp_name, race.pointsPenalised, race.finalScore + race.pointsPenalised AS unpenalised_score, race.finalScore
FROM race
INNER JOIN raceType
    ON race.raceType = raceType.id
    INNER JOIN course
        ON race.course = course.id
        INNER JOIN team
            ON race.team = team.id
            LEFT OUTER JOIN player AS mvp
                ON race.mvp = mvp.id
                LEFT OUTER JOIN player AS obs
                    ON race.observer = obs.id;
GO 

SELECT * 
FROM playerView

SELECT *
FROM raceView


/* Additional Information:
   The views are very convenient replacements for the tables they represent, as they include the names and calculated values that you will often need in queries.
   You are very much encouraged to use the views to simplify the queries that follow.  You can use a view in a SELECT statement in exactly the same way as you can use a table.

   If you wish to create additional views to simplify the queries which follow, include them in this file.
*/

当我分别运行每个CREATE VIEW时，似乎正确运行它没有错误。但是当我尝试运行整个脚本时，它给了我这个错误。

Msg 111，Level 15，State 1，Line 20 'CREATE VIEW'必须是查询批处理中的第一个语句。 Msg 111，Level 15，State 1，Line 15 'CREATE VIEW'必须是查询批处理中的第一个语句。 Msg 208，Level 16，State 1，Line 2 无效的对象名称'playerView'。

在尝试运行此脚本之前，我首先删除数据库，重新创建表，填充它们然后运行此脚本。

我出错的任何想法？

答案

把GO放在PRINT 'Creating Player View'之后它应该工作：

PRINT 'Creating Player View'
GO

CREATE VIEW playerView AS

另一答案

批处理由GO这个词分隔 - 这是对客户端工具的指令，而不是SQL Server的指令，特别是告诉这些工具如何将查询拆分成批处理。

该错误告诉您CREATE VIEW必须是批处理中的第一个语句：

USE Assignment2;
GO

/* Player View (2 marks)
    Create a view which shows the following details of all players:
        • The ID number of the player
        • The first name and surname of the player concatenated and given an alias of “full_name”
        • The team ID number of the player (if applicable)
        • The team name of the player (if applicable)
        • The coach ID number of the player (if applicable)
        • The name of the player’s coach (if applicable)

   Creating this view requires a select statement using multiple joins and concatenation of names.  
   Make sure that you use the appropriate type of join to ensure that players without teams or coaches are still included in the results.

*/


-- Write your Player View here
PRINT 'Creating Player View'

GO -->-- New GO here

CREATE VIEW playerView AS 

所以我在GO之前添加了一个CREATE VIEW

另一答案

将CREATE VIEW代码放在EXECUTE中

SOME CONDITION..

EXECUTE('CREATE  VIEW vwName...')

另一答案

这通常是因为能够创建VIEW或任何DBO，您需要将整个脚本放在TRANSACTION中，或者需要打开SET QUOTED_IDENTIFIER。

即

USE [yourdatabase]
GO

SET NUMERIC_ROUNDABORT, IMPLICIT_TRANSACTIONS OFF
SET ANSI_PADDING, ANSI_NULLS, QUOTED_IDENTIFIER, ANSI_WARNINGS, CONCAT_NULL_YIELDS_NULL, ARITHABORT, XACT_ABORT ON
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
GO

BEGIN TRANSACTION
GO

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON

...
...

-- Write your Race View here
PRINT 'Creating Race View'
GO

CREATE VIEW raceView AS 
SELECT race.id, race.dateOfRace, race.raceType, raceType.name AS raceTypeName, race.course, course.name AS courseName, race.team, team.name AS teamName, race.observer, obs.firstName + ' ' + obs.surname AS observer_name, race.mvp, mvp.firstName + ' ' + mvp.surname AS mvp_name, race.pointsPenalised, race.finalScore + race.pointsPenalised AS unpenalised_score, race.finalScore
FROM race
INNER JOIN raceType
    ON race.raceType = raceType.id
    INNER JOIN course
        ON race.course = course.id
        INNER JOIN team
            ON race.team = team.id
            LEFT OUTER JOIN player AS mvp
                ON race.mvp = mvp.id
                LEFT OUTER JOIN player AS obs
                    ON race.observer = obs.id;
GO 

IF @@ERROR <> 0 BEGIN IF @@TRANCOUNT > 0 ROLLBACK SET NOEXEC ON END
GO

IF @@TRANCOUNT>0 COMMIT TRANSACTION
GO

SET NOEXEC OFF

另一答案

如果尝试从Entity Framework迁移执行脚本，您可能还会遇到此问题。我认为这是由于EF在事务中运行这些脚本（如此问题的另一个答案中所述）。你可以用这种语法来解决这个问题：

IF NOT EXISTS (SELECT * FROM sys.views WHERE object_id = OBJECT_ID(N'[dbo].[V_MovieActors]'))
EXEC dbo.sp_executesql @statement = N'CREATE VIEW [dbo].[V_MovieActors]
AS
SELECT       NEWID() AS Id, dbo.Movie.Title, dbo.Movie.ReleaseDate, dbo.Actor.FirstName + '' '' + dbo.Actor.LastName AS Actor, dbo.Actor.DateOfBirth
FROM            dbo.Actor INNER JOIN
                         dbo.Movie ON dbo.Actor.Id = dbo.Movie.Actor_Id
'

这将整个事情转变为SQL执行的单个命令。这种方法来自这篇非常有用的文章Using SQL Views With Entity Framework Code First by Morgan Kamoga。