Mysql 逐个显示带有重复StudentId的验证消息

我想检查sql server中的重复Id验证，即验证网格显示 来自sql server的行号、验证消息和重复ID

我不明白我该怎么做

帮助真的很感激

创建表

    CREATE TEMPORARY TABLE IF NOT EXISTS Tbl_Student
    (RowID INT PRIMARY KEY auto_increment, StudentID BIGINT);

插入记录

Insert into Tbl_Student(RowID,StudentID) values (1,101)
Insert into Tbl_Student(RowID,StudentID) values (2,102)
Insert into Tbl_Student(RowID,StudentID) values (3,101)
Insert into Tbl_Student(RowID,StudentID) values (4,102)
Insert into Tbl_Student(RowID,StudentID) values (5,103)

如果有任何解决方案，请与我们分享

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谢谢

这是T-SQL代码，您可能需要将其转换为MySql格式：

Select * from(
      Select RowId, Count(*) Over(Partition By StudentId Order By RowId) as Cnt From [YourTable]
) as K
Where Cnt>1

您也可以使用

行数

或

计数

聚合函数来实现相同的结果

以下是大量解决此问题的MySql解决方案：

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要显示副本，我将执行以下操作：

select
  RowID, 
  concat('Student ', StudentID, ' is duplicate') as StudentID
from Tbl_Student where StudentID in (
  select StudentID from Tbl_Student group by StudentID having count(*) > 1
)

---

请尝试以下查询

SELECT RowID, CONCAT('StudentID ',StudentID, ' is Duplicate) AS Error FROM Tbl_Student WHERE StudentID IN (SELECT StudentID FROM Tbl_Student GROUP BY StudentID  HAVING COUNT(*) > 1)

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您可以在suquery上使用一个连接，使strundet id的计数大于1

  select id,  student_id, concat('Stundent id' , student_id, ' is duplicated')
  from  my_table m
  inner join  (
    select student_id 
    from my_table  
    group by student_id 
    having count(*) > 1  
  ) t on t.student_id  = m.student_id

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它是mysqlsyntex@GordonLinoff如果有任何可用的解决方案，您可以共享sql server代码syntaxNo prevention不适用于此处，我必须仅为学生显示验证消息。在您的示例101中没有重复。。expalin更好的可能的副本