Home Database Mysql Tutorial 获取SQL SERVER数据库insert into操作的主键返回值

获取SQL SERVER数据库insert into操作的主键返回值

Jun 07, 2016 pm 03:48 PM
insert server sql database Obtain

插入一条记录后想要立刻获取其数据表中的 主键 返回。这个主键是自动生成的,其实实现的方式有很多,比如再进行一次 查询 ,获取出来。或者在插入数据之前取出最大,在最大上面加一等等,方法很多,但是有些很不方便。 个人感觉最快的方式就是,在插入数据后

  插入一条记录后想要立刻获取其数据表中的主键返回值。这个主键是自动生成的,其实实现的方式有很多,比如再进行一次查询,获取出来。或者在插入数据之前取出最大值,在最大值上面加一等等,方法很多,但是有些很不方便。

  个人感觉最快的方式就是,在插入数据后直接获取主键的值,然后返回过来。

  方法如下:

  sql语句如下:

INSERT INTO tableName (fieldname ...) values (value ...) SELECT @@IDENTITY AS returnName;

  在sql语句中加入SELECT @@IDENTITY AS returnName;用来获取主键的值

  在程序中获取返回值:

public int sqlexecutereader(string sql)
  {
  DBopen();
  SqlCommand myComm = new SqlCommand(sql, Connection);
  int newID = Convert.ToInt32(myComm.ExecuteScalar());
  DBclose();
  return newID;
  }

  当然在此处主键是int类型的自动增加的。DBopen();DBclose();的操作在此就不多说了。

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