Hi,
You have just to use the ABS function and compare .
Do you mean something like this:
create table #table1 (val1 int)
insert into #table1 values(1)
insert into #table1 values(60)
insert into #table1 values(-15)
insert into #table1 values(-130)
insert into #table1 values(120)
select max(abs(val1)) from #table1
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