根据表名得到除主键外的所有字段

Create FUNCTION [dbo].[fn_FieldsExceptPK]
(
    @TableName Varchar(50)
)
RETURNS Varchar(MAX)
AS
BEGIN
    DECLARE @ReturnValue As Varchar(MAX)
    Set @ReturnValue=''

    Declare @PKName As Varchar(50)

    SELECT @PKName=syscolumns.name
    FROM syscolumns,sysobjects,sysindexes,sysindexkeys
    WHERE syscolumns.id = OBJECT_ID(@TableName)
    AND sysobjects.xtype = 'PK'
    AND sysobjects.parent_obj = syscolumns.id
    AND sysindexes.id = syscolumns.id
    AND sysobjects.name = sysindexes.name
    AND sysindexkeys.id = syscolumns.id
    AND sysindexkeys.indid = sysindexes.indid
    AND syscolumns.colid = sysindexkeys.colid
    
    Declare @Count as Int
    
    Select @Count=Count(1)
    From syscolumns
    Where syscolumns.id = OBJECT_ID(@TableName)
    AND Upper(syscolumns.name)<>@PKName


    
    Declare @i as Int
    Set @i=1

    While  (@i<=@Count)
    Begin
        Declare @name As Varchar(50)

        Select @name=Fields.Name
        From(
        Select syscolumns.name,syscolumns.colid,Row_Number() Over(Order By syscolumns.colid) As Rn
        From syscolumns
        Where syscolumns.id = OBJECT_ID(@TableName)
        AND Upper(syscolumns.name)<>@PKName) As Fields
        Where Fields.Rn=@i

        Set @ReturnValue=@ReturnValue+@name
        IF(@i<@Count)
        Begin
            Set @ReturnValue=@ReturnValue+','
        End
        Set @i=@i+1
    End
    RETURN @ReturnValue

END