From https://www.postgresql.org/docs/8.2/static/functions-matching.html:
The operator ~~ is equivalent to LIKE, and \~~ corresponds to ILIKE.
There are also !~~ and !~~ operators that represent NOT LIKE and NOT ILIKE, respectively. All of these operators are PostgreSQL-specific.
From https://www.postgresql.org/docs/8.2/static/functions-matching.html: The operator ~~ is equivalent to LIKE, and \~~ corresponds to ILIKE. There are also !~~ and !~~ operators that represent NOT LIKE and NOT ILIKE, respectively. All of these operators are PostgreSQL-specific.