I want to add a column to an existing legacy database and write a procedure by which I can assign each record a different value. Something like add a column and autogenerate the data for it.
Like, if I add a new column called “ID” (number) I want to then initialize a unique value to each of the records. So, my ID column will have records from say 1 to 1000. How do I do that?
Solution
This will depend on the database but for SQL Server, this could be achieved as follows:
alter table Example
add NewColumn int identity(1,1)
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