Dynamic SQL to update table with random values from the same table

Question

I want to create a dynamic SQL in a stored procedure that takes a table name as a parameter and for each column in that table the values will be updated with a random value from the same column.
( I need this to create tables for testing purposes so that I don't use real data ).
For example let's say I have the table 'students' below:

|ID| FName|  BirthDay |
-----------------------
|1 | Mike | 1993-07-24|
-----------------------
|2 | John | 1995-10-11|
-----------------------
|3 | Bob  | 1992-04-13|
-----------------------

After the update the values will be updated randomly using the same values from the table:

|ID| FName|  BirthDay |
-----------------------
|2 | Bob  | 1995-10-11|
-----------------------
|3 | John | 1995-10-11|
-----------------------
|3 | Mike | 1992-04-13|
-----------------------

For the random value I tried something like this:

 UPDATE students
   SET ID = SELECT TOP 1 ID FROM students ORDER BY NEWID()
   SET FName = SELECT TOP 1 FName FROM students ORDER BY NEWID()
   SET Birthday = SELECT TOP 1 Birthday FROM students ORDER BY NEWID()

Do you have any idea how to implement this as a stored procedure(SQL Server) so i can use it with any table given as a parameter?

Later edit : I have done this so far (it takes the table name as parameter and updates every column it finds in that table but the problem is that after update all the values in a column are the same).
Here is the code:

CREATE PROCEDURE [dbo].[RandomUpdate]
   @TableName NVARCHAR(100)
    AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;
    DECLARE @sql NVARCHAR(MAX) = (
    SELECT ' UPDATE ' + @TableName--note the extra space at the beginning
        + ' SET ' + QUOTENAME(c.name) + ' = ' + '(SELECT TOP 1 ' + QUOTENAME(c.name) + ' FROM ' + @TableName + ' ORDER BY NEWID());' 
    FROM sys.columns c
    WHERE c.object_id = OBJECT_ID(@TableName)
    FOR XML PATH('')
)
    PRINT @sql;
    EXEC sp_executesql @sql


END

and the output is like this:

|ID| FName|  BirthDay |
-----------------------
|3 | Bob  | 1995-10-11|
-----------------------
|3 | Bob  | 1995-10-11|
-----------------------
|3 | Bob  | 1995-10-11|
-----------------------

Any ideas how to set different values?

Answer 1

只需将以下内容添加到 SQL 语句的顶部 CREATE PROCEDURE [nameofprocedure] AS