How to check whether the number is negative or positive, but not using GT 0 or LT 0 options.

[Sagarg]

Can we use sign(x) function in Proc sql. Sign(x) will gives you sign of given number in (-1/+1).

[Kurt_Bremser]

Try it.

Maxim 4: 

If in doubt, do a test run and look at the results. If puzzled, inquire further.