How do I flip a bit in SQL Server?
SqlSql ServerBit ManipulationSql Problem Overview
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).
Sql Solutions
Solution 1 - Sql
Yes, the ~ operator will work.
update foo
set Sync = ~@IsNew
Solution 2 - Sql
Bitwise NOT: ~
Bitwise AND: &
Bitwise OR: |
Bitwise XOR: ^
Solution 3 - Sql
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.
Solution 4 - Sql
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
Solution 5 - Sql
~ operator will work only with BIT,
try: ~ CAST(@IsNew AS BIT)