Need a sql statement to remove data?

Question

Hello,
I need your help regarding my query.
I need to put a sql statement in a shell script that will delete records from a table that is > than 3 months old and if not, do nothing.
The table has a DATE column as shown below:
LOG_ID NOT NULL VARCHAR2(8)
LOG_TYPE NOT NULL VARCHAR2(8)
LOG_MESSAGE NOT NULL VARCHAR2(255)
LOG_DATE DATE
I'm a novoice at sql and request you to provide me a sql statement that will do the above.
Much appreciated!
Regards,

Answer 1

SQL> select sysdate from dual;
SYSDATE
14-JUL-09
SQL> select add_months(sysdate,-3) from dual;
ADD_MONTH
14-APR-09
SQL> select add_months(sysdate,-3)-1 from dual;
ADD_MONTH
13-APR-09
DELETE FROM {table_name} WHERE HIREDATE<={pick the date format from above accordingly}