How to minus date from sysdate using oracle inline query?
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I am creating one query. In that query i want minus date from system date. My table is like below.

    Table Name : Employee
    ---------------------
    ID
    NAME
    JOINDATE

I am writing this query to fetch my result

    SELECT * FROM SS.EMPLOYEE WHERE (sysdate - JOINDATE)='05-Ded-11'

But it giving me an error...So how to do this???If anyone knows than please help me.