question about SQL statement from a beginner

[sbraaa]

Hi, my question is:

update table set field1 = 0;
update table set field2 = 0;
update table set field3 = 0;
update table set field4 = 0;

or

update table set field1=0, set field2=0, set field3=0, set field4=0

which is the fastest?

 

[ceco]

i haven't tested it, but for no reason the first should be faster

so the second one is better