小编zoe*_*oe 的帖子

我有以下触发器:

 CREATE Trigger enroll_limit on Enrollments
 Instead of Insert
 As
 Declare @Count int
 Declare @Capacity int
 Select @Count = COUNT(*) From Enrollments
 Select @Capacity = Capacity From CourseSections
 If @Count < @Capacity
 Begin 
      Insert Into Enrollments Select * From Inserted
 End
 GO

我收到一条错误消息说:

'CREATE TRIGGER'必须是查询批处理中的第一个语句.

我尝试将文本文件导入数据库时​​收到转换错误.以下是我收到的错误消息:

第1行第4列(年)的批量加载数据转换错误(类型不匹配或指定代码页的无效字符).

这是我的查询代码:

CREATE TABLE Students
(
    StudentNo    Integer NOT NULL Primary Key,
    FirstName    VARCHAR(40) NOT NULL,
    LastName     VARCHAR(40) NOT NULL,
    Year         Integer,
    GPA          Float NULL
);

以下是来自文本文件的示例数据:

100,Christoph,Van Gerwen,2011
101,Anar,Cooke,2011
102,Douglis,Rudinow,2008

我想我知道问题是什么..下面是我的批量插入代码:

use xta9354
bulk insert xta9354.dbo.Students
from 'd:\userdata\xta9_Students.txt' 
with (fieldterminator = ',',rowterminator = '\n') 

对于样本数据,在Year属性之后没有',',即使在年之后还有另一个属性Grade,它是NULL

有人可以告诉我如何解决这个问题吗？

当我尝试导入org.apache.xml.serialize.XMLSerializer时,我得到以下错误消息:

 The import org.apache.xml.serialize.XMLSerializer cannot be resolved

谁能告诉我原因？谢谢!!

我有以下触发器:

  CREATE Trigger instructor_expertise on CourseSections
     After Insert
     As Begin
     ......

     If (Not Exists(Select AreaName From AreasOfInstructor Where (InstructorNo = @InstructorNo AND AreaName = @AreaName))) 
     Begin 
     RAISERROR('Course not in instructors expertise', 16, 1)
     rollback transaction  
     End
     GO

我的问题是,"回滚交易"是否删除了行？如果它是'For Insert',那么'回滚事务'会删除该行中的行吗？

谢谢!!!

以下是我的代码.

def __init__(self):
    self.node=[]
    self.fronts=[]
    self.GoalNode=['1','2','3','4','5','6','7','8','0']
    self.StartNode=['1','2','3','4','5','6','7','8','0']
    self.PreviousNode=[]
    self.prePreviousNode=[]
    self.PreviousCount=1

def Solve(self):
    self.shufler(10)
    ......


def shufler(self):

        while True:
            node=self.StartNode

以下是我收到的错误消息:

File "E:\Zoe's file\CMPT 310\Assign 2\astart8puzzle\AI8puzzle\py8puzzel.py", line 18, in Solve
    self.shufler(10)
TypeError: shufler() takes exactly 1 positional argument (2 given)

我不明白我在哪里提出两个论点.