Insert Data from same table but change one value


I've a simple table:
Val1 Val2 Val3
1      1       ...
1      2       ...
2      1       ...
2      2       ...

Now I need somethin like this but in one step:
INSERT INTO mytable SELECT * FROM mytable WHERE Val1=1
UPDATE mytable SET Val1=3

The original Val1=1 should be unchanged, only the new inserted ones should be changed to 3

The result I need:
Val1 Val2 Val3
1      1       ...
1      2       ...
2      1       ...
2      2       ...
3      1       ...
3      2       ...

There's a index of Val1 + Val2 if it's important.


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Éric MoreauSenior .Net ConsultantCommented:
change the value at the same time you are inserting:

INSERT INTO mytable (Val1, Val2, Val3)
SELECT 3, Val2, Val3
FROM mytable
WHERE Val1=1

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Microsoft SQL Server 2008

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