Has anybody used REGEXP_LIKE to validate passwords? I have a table with strings (i.e. passwords) but this select is not returning any values. select * from dept where REGEXP_LIKE(LOC,'^.*(?=.*{9,})(?=.*\d)(?=.*[A-Za-z])(?=.*[_#]).*$')); this should return strings with at least 9 char at least 1 digit at least _ # special char at least a lower or upper case char Does any have any experience with this? thanks, _________________________________________________________________ Hotmail: Powerful Free email with security by Microsoft. http://clk.atdmt.com/GBL/go/201469230/direct/01/