Finding fields with non alfa numeric values

Question

I am looking a way to find the values in a column that has non alfa numeric values...

I tried select 'kjh$' not RLIKE '([0-9][a-z]|[A-Z])*') but does not work

Thanks for your help

Answer 1

You can use REGEXP '^[A-Za-z0-9]+$' or RLIKE '^[A-Za-z0-9]+$'.
Sample SQL -

select  * from my table where mycol not RLIKE '^[A-Za-z0-9]+$' 

^ - determines start of the string
$ - end of the string
+ - match the preceding character one or more times
[A-Za-z0-9] - to check alphanumeric or not

I ran a simple select statement to show output of above regex.