How to write an expression as the last day of the month?

Question

PostgreSQL

Good evening, I am creating a table and I need to write a default expression in the form of the last day of the month in one column, how can I do this?
those

create table
(
   lastMounthDay <тип данных> DEFAULT <выражение>
)

How can you get and write such an expression?

Answer 1

https://stackoverflow.com/a/28186984