MySQL: Simple way to toggle a value of an int field

Question

I know how to do this, but i think I\'ll overcomplicate it with double selects and so on.

How can you do this (example in pseudo-sql)

UPDATE some_table S         


        

Answer 1

UPDATE table SET field = 1 - field

Answer 2

UPDATE some_table SET an_int_value = IF(an_int_value=1, 0, 1)

Answer 3

If you're using TINYINT (0 and 1) then do a simply XOR (https://dev.mysql.com/doc/refman/8.0/en/logical-operators.html#operator_xor)

UPDATE
    `some_table`
SET
    `an_int_value` = `an_int_value` ^ 1

Testing:

SELECT 0 ^ 1; /* returns 1 */

SELECT 1 ^ 1; /* returns 0 */

Answer 4

I can see the answers of all experienced people and i too got updated with their answers.

what about this... i do this way...

UPDATE tablename SET fieldname = not fieldname

can any body give suggestions please if this will not be a feasible solution. with respect to execution speed or any other... what to say... fact... concept... .

Answer 5

For ENUM(0,1) UPDATE some_table SET an_int_value = IF(an_int_value='1', '0', '1');

Answer 6

In this case, you could use an XOR type operation:

UPDATE some_table SET an_int_value = an_int_value XOR 1

This is assuming that an_int_value will always be 1 or 0 though.