renumber primary key

Question

How would I reset the primary key counter on a sql table and update each row with a new primary key?

Answer 1

Not sure which DBMS you're using but if it happens to be SQL Server:

SET IDENTITY_INSERT [MyTable] ON

allows you to update/insert the primary key column. Then when you are done updating the keys (you could use a CURSOR for this if the logic is complicated)

SET IDENTITY_INSERT [MyTable] OFF

Hope that helps!