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MS Sql Convert int column to identity conserving data

Posted on 2010-08-31
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Last Modified: 2012-05-10
I have a field with integers, they are not repeated and go from 1 to 1000, I need it to set it as an identity column (1,1) preserving the data it has since it is the key for a relation with another table.

This table was imported from a system that incremented this field by 1 manually.


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Question by:robrodp
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zapacila89 earned 500 total points
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If you have access to enterprise manager or SSMS, you can browse to the table, right click => design.

In the definition of the table, select the column, set identity on and seed value to the last existing value in the table. Do save.

More info on the steps

Highlight the column (actually a row in this presentation) you are interested in by left clicking the gray square to the left of the column name.
With the row highlighted the column detail will be shown in the bottom half of the window with all the things you need.

Next record inserted into to the table will have the next identity column auto incremented.

(In SSMS 2005 you simple change the column to be as identity same from the design window (rigt-clik on table name an click design) and clicking on the column in the bottom will appear a table of properties which contains Identity specification. In SSMS 2005 it will automatically pick from the next number)
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