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How to set a table's field to autonumber using a query in sql

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Execution time: 0,03 sec, rows selected: 12, rows affected: 20, absolute service time: 0,19 sec 
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   ssn firstname id
1 111111 Jeff 1
2 123456 Kevin 2
3 654321 Mark 4
4 555555 David 3
   ssn firstname Id
1 111111 Jeff 1
2 123456 Kevin 2
3 654321 Mark 4
4 555555 David 3
   ssn firstname Id
1 111111 Jeff 1
2 123456 Kevin 2
3 654321 Mark 4
4 555555 David 3

    
                
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