updating a table using other table values

[hgriva]

Hi,
i have a question
-------------------------------------
i have 2 tables
user_security and customer


table structures
-----------------------------
user_security
---------------------
Name Null? Type
----------------------------------------- -------- ----------------------------
LOGON_ID NOT NULL VARCHAR2(12)
LAST_NAME VARCHAR2(30)

the last name column has been added recently.


sample records
-------------------------
logon_id last_name
----------------------------------------------------
k1
q1
q2
q3
q4


customer
---------------

Name Null? Type
----------------------------------------- -------- ----------------------------
LAST_NAME VARCHAR2(30)

sample records
-----------------------
LAST_NAME
---------------------
www
wxy
zzz
....
..
...
...
scenario
---------------
i have to update the user_security table with values of last_name from customer table only for users whose logon_id starts with 'q'

Any help would be welcomed.

[aijazdba]

Which corresponding value of customer table to you want to be taken for update ?