Determine if a column contains special characters in a postgresql table

Question

I have a table in PostgreSQL, and I need to determine if the column contains special characters like #,$,^,&,*,@,! etc. or empty.

For example, a table might look like this:

How to write such a request?

Answer 1

Finally, I got a solution

 select * from table where column1 ~* '[^a-z0-9]' or column2 ~* '[^a-z0-9]' or column3 ~* '[^a-z0-9]'