Question

我有一个生成表的脚本 - 只有我的SQL 2008版本会引发错误 - 语法是否已更改？或者我该如何手动修复它？

CREATE TABLE ScoHistory (
    CourseID varchar (255) NOT NULL ,
    SessionID int NOT NULL ,
    ScoID varchar (255) NOT NULL ,
    StudentID varchar (255) NOT NULL ,
    DateRecorded datetime NULL ,
    score_raw varchar (12)  NULL,
    KEY student_course_sess_scohist_idx (StudentID, CourseID, SessionID, ScoID) -- this is the bit it doesn't like! It says incorrect syntax near KEY...
);

非常感谢，

短套壳

Answer 1

您可以像这样定义命名主键表约束：

CREATE TABLE ScoHistory (
CourseID varchar (255) NOT NULL,
SessionID int NOT NULL,
ScoID varchar (255) NOT NULL,
StudentID varchar (255) NOT NULL,
DateRecorded datetime NULL,
score_raw varchar (12) NULL,
CONSTRAINT student_course_sess_scohist_idx PRIMARY KEY (StudentID, CourseID, SessionID, ScoID) 
);

Answer 2

如果这是预期的行为，它会像这样工作：

CREATE TABLE ScoHistory ( 
    CourseID varchar (255) NOT NULL , 
    SessionID int NOT NULL , 
    ScoID varchar (255) NOT NULL , 
    StudentID varchar (255) NOT NULL , 
    DateRecorded datetime NULL , 
    score_raw varchar (12)  NULL, 
    PRIMARY KEY (StudentID, CourseID, SessionID, ScoID) 
);

您只想在表上创建一个非唯一索引，使用CREATE INDEX语句创建索引。

Answer 3

CREATE TABLE ScoHistory
  ( 
   CourseID varchar(255) NOT NULL
  ,SessionID int NOT NULL
  ,ScoID varchar(255) NOT NULL
  ,StudentID varchar(255) NOT NULL
  ,DateRecorded datetime NULL
  ,score_raw varchar(12) NULL,
  ) ;

ALTER TABLE dbo.ScoHistory ADD
CONSTRAINT PK_ScoHistory PRIMARY KEY (StudentID, CourseID, SessionID, ScoID);

SQL 2008创建表方法和KEY

3 个答案: