if exists (select * from sysobjects where id = object_id('dbo.sp_DeleteKeyDups') and sysstat & 0xf = 4)
	drop procedure dbo.sp_DeleteKeyDups
GO

Create Procedure sp_DeleteKeyDups
(
	@table_name		varchar(30) ,
	@field_name		varchar(30) = 'formula_key'
)
As


exec(
	'select	' + @field_name + ', dups=count(' + @field_name + ') ' + 
	'into	#tbl_1 ' + 
	'from	' + @table_name + ' ' + 
	'group by ' + @field_name + ' ' + 
	'having count(' + @field_name + ') > 1 ' + 

	'delete from ' + @table_name + ' ' + 
	'where ' + @field_name + ' in (select ' + @field_name + ' from #tbl_1) ')

return (0)
GO