在PostgreSQL中翻转布尔值

Question

I have a Boolean type field in my table (PostgreSQL 9.0)

Is there a way to write a query that update this field to the opposite value without knowing what is currently there?

if it's True then it will be updated to False .

if it's False then it will be updated to True .

Basically I'm asking if there is a mechanism that allows treating Boolean type same as 1 bit . For example in C if x can be {1,0} you can simply write x=!x and if it was 0 it will be 1 , if it was 1 it will be 0 . No need for IF statment etc...

Answer 1

Why not to use operator NOT?

Update tableName
set c = NOT c 
where ...

http://www.postgresql.org/docs/current/static/functions-logical.html

Example in SqlFiddle