> "RT" == "Rod Taylor" <[EMAIL PROTECTED]>:
RT> NULL is similar to UNKNOWN.
RT>
RT> So, NULL = NULL is the similar to UNKNOWN = UNKNOWN. Since you don't
RT> know it, how can you tell if they're equal or not?
RT>
RT> Syntax you're looking for is: AND parent_id IS NULL
ah, of course. Thanks
Howdy,
I'm sure most of you PostgreSQL users out there will be able to answer
this, but I'm just not finding the answer.
Let's say I have a table called project that has three fields:
field| type
---
id int
name varchar(30)
parent_id int
right now there is
