How to select integer values only from a varchar column in PostgreSQL

问题

How to select integer values only from a varchar column in PostgreSQL?

If the column contains:

abc
70
3g
71
1.5

I'd like to select only:

70
71

I'm struggling to find functions like: is_numeric, is_integer, to do something like this:

SELECT column
FROM table
WHERE isinteger(column)

Any ideas? Thank you.

回答1:

SELECT column
FROM table
WHERE column ~ '^\d+$'

来源：https://stackoverflow.com/questions/15163793/how-to-select-integer-values-only-from-a-varchar-column-in-postgresql