Help in update data

Question

Hi, I am unable to update in entity column and gets the error. How I can update this script successfully. Any help please.
My SQL-Script
update pruder set hr_tb=345 where  hr_tb=10
Error message
Can not
update
identity
column

Answer 1

UPDATE requires an INSERT and DELETE, so IDENTITY_INSERT won't help.
This technique can work...
CREATE TABLE #forumTable (hr_tb INT IDENTITY, val INT)
INSERT INTO #forumTable (val)
VALUES (1),(1),(1),(1),(1)
ALTER TABLE #forumTable ADD hr_tbX int
UPDATE #forumTable SET hr_tbX = hr_tb
UPDATE #forumTable SET hr_tbX = 6 WHERE hr_tbX = 1
CREATE CLUSTERED INDEX sorter ON #forumTable ( hr_tbX)
ALTER TABLE #forumTable
DROP COLUMN hr_tb
ALTER TABLE #forumTable
ADD hr_tb INT IDENTITY
DROP INDEX sorter ON #forumTable
ALTER TABLE #forumTable
DROP COLUMN hr_tbX
SELECT * FROM #forumTable
DROP TABLE #forumTable
But, you might be better off just deleting the record and re-adding it to the end of the table.
As Jingyang says, its bad, don't do it... it leads only to the dark side, and they do not have the cookies they promised.