本文介绍了SQL数据库中的主键字段的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如果可以添加,请问我是否可以 SQL数据库的主键.我尝试过的方式 我可以对SSCE数据库进行操作,但无法正常工作. 谢谢
Hi, could u kindly advise me if it is possible to add primary key to SQL database. I tried the way I could do for SSCE database but it didnot work. Thanks
推荐答案如果要在事务sql中进行操作,并且已经有一个表,则类似: If you want to do it in transact sql and you already have a table then something like: ALTER TABLE SomeTable ADD CONSTRAINT PK_SomeTable PRIMARY KEY (PrimaryKeyColumn);
那只是一个小例子,因此在执行真实语句之前,请通读: -主键约束 [ ^ ] - ALTER TABLE [ ^ ] -创建和修改主键约束 [ ^ ]
That''s just one small example so before executing the real statement, read through: - PRIMARY KEY Constraints[^] - ALTER TABLE[^] - Creating and Modifying PRIMARY KEY Constraints[^]
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SQL数据库中的主键字段
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