How do I flip a bit in SQL Server?

Question

I'm trying to perform a bitwise NOT in SQL Server. I'd like to do something like this:

update foo
set Sync = NOT @IsNew

Note: I started writing this and found out the answer to my own question before I finished. I still wanted to share with the community, since this piece of documentation was lacking on MSDN (until I added it to the Community Content there, too).

Bangtail

I read this wrong I think...was gonna tell you that you can't make a Uturn in SQL Server...:P – Titus

Another article: blogs.lessthandot.com/index.php/DataMgmt/DBProgramming/… – Bangtail

Answer 1

Yes, the ~ operator will work.

update foo
set Sync = ~@IsNew

Incite

Answer 2

Bitwise NOT: ~

Bitwise AND: &

Bitwise OR: |

Bitwise XOR: ^

Bangtail

Answer 3

Lacking on MSDN? http://msdn.microsoft.com/en-us/library/ms173468(SQL.90).aspx

~: Performs a bitwise logical NOT operation on an integer value. The ~ bitwise operator performs a bitwise logical NOT for the expression, taking each bit in turn. If expression has a value of 0, the bits in the result set are set to 1; otherwise, the bit in the result is cleared to a value of 0. In other words, ones are changed to zeros and zeros are changed to ones.

Ignoramus

D'oh. I just looked under bitwise operators and ~ unary operators :) – Bangtail

Answer 4

For the sake of completeness:

SELECT b, 1 - b
FROM
  (SELECT cast(1 AS BIT) AS b
   UNION ALL
   SELECT cast(0 AS BIT) AS b) sampletable

Brunhilde

Answer 5

~ operator will work only with BIT,

try: ~ CAST(@IsNew AS BIT)

Vaunting