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Message Posted: Mon, 12 Mar 2007 @ 17:29:36 GMT

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Subj:   Incrementing field with an INSERT
From:   Barrow, Martin


I have created a table that has a unique id that is incremented by 1 every time a row is inserted.

I started with the following to initially populate the table:

     CREATE SET TABLE identity_test ,
         ( Test_Index INTEGER NOT NULL,
            cidpersid integer

     Insert into identity_test
     select row_number () over (order by cidpersid)
     from training.cid_persons;

and then this when doing further inserts:

     Insert into identity_test (test_Index, CIDPERSID)
     Select maxid + 1
     from (select max(test_index) from identity_test ) a (maxid);

The insert above works fine when only inserting a row at a time, but how can I add a bunch of inserts (i.e. Insert select from another table) and get it to increment the Test_Index, starting at the current max?



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