我是一个启动sql server的新手程序员。在这种情况下，我有dbo.Students，dbo.Account＆amp; dbo.Employee。我试图将StudentsCode中的dbo.Students和EmployeeCode中的dbo.Employee约束到username中的字段dbo.Account。但是，每次我向用户帐户插入数据时都会显示以下错误The INSERT statement conflicted with the FOREIGN KEY constraint "FK_UserAccount_Students". The conflict occurred in database "soal2016", table "dbo.Siswa", column 'StudentsCode'.任何帮助都将不胜感激。谢谢