I want help in sql part in the filter!!!!!!!!!!!

[katdbc]

how to subtract days!!we are using db2.
i want

difference(contract_maturity_date,etl_date) <= 120
these two are different columns containg dates
how will i give this filter.plz help

[cognostechie]

_days_between(contract_maturity_date,etl_date) <= 120

[katdbc]

Thank you so much!!!!
i used some thing similar like
_add_days(exp,numeric day which u wanna add)

thanks ppl fr ur views