Docs: Not Null Constraint Doc Update

[knz]

Re: Not Null Constraint

Issue Description

This page does not refer to the page on NULL handling

Suggested Resolution

Add a link to null handling at the first mention of "NULL" at the top, and one more in "See also" at the bottom.

[aniketrb-github]

Hello @Amruta-Ranade
I understood this issue, and I am willing to contribute for the same.
Can you please assign it to me for the hacktoberfest event?
Thanks.

[Amruta-Ranade]

@aniketrb-github Hey! We are asking participants to work on one issue at a time. Once you finish working on the comparison page issue, check back to see if this one is available :)

[aniketrb-github]

hi @Amruta-Ranade can I work on this issue?
or do I have to wait till my previous PR gets merged? because it's still open as of now. Please let me know. Thanks.

[jeffugo]

@Amruta-Ranade I'd like to work on this if it's available.

[Amruta-Ranade]

@aniketrb-github I am merging your PR now but do you mind if @jeffugo took this one? I am trying to let more folks contribute and you already made an excellent contribution!

Update: Never mind. Assigned another issue to @jeffugo that they expressed interest in. Assigning this one to @aniketrb-github

[aniketrb-github]

Oh okay. Fine.
I'll work on it. Thanks @Amruta-Ranade.

[aniketrb-github]

@Amruta-Ranade , @knz
Q1) As per the issue description, I need to add a hyperlink(v19.2/null-handling.md) to the very first occurrence of NULL and not for the rest occurrences elsewhere, right?

Q2) And in See Also section on the same page, I guess I need to add a NEW entry of the Null Handling hyperlink here as well? right?

Also, the required 2 links that are to be added will be referencing the to the v19.2 strictly right?
Since the link in the "Issue Description" above points to the v20.2/null-handling.md
I see each version say v19.x or v.20.x have their own set of distinct/duplicate copies maintained as of now.

Please correct me if I'm wrong regarding my understanding here, So that I can proceed.
Thanks.

[Amruta-Ranade]

Yep..you are on the right track. Please update the 20.1 and 20.2 files as well.

[aniketrb-github]

Yep..you are on the right track. Please update the 20.1 and 20.2 files as well.

Thanks for the go-ahead.
I raised a PR, but I will do the changes for the v.20.2 and v.20.1 also shortly.

[aniketrb-github]

Do we need to handle it for v19.1 as well?
I have made changes currently for v19.2, v20.1, and v20.2

[Amruta-Ranade]

Umm..it's okay if you don't. I think we support two previous versions, so v19.1 docs need not be updated. If it turns out I am wrong, I will update them later :)

[aniketrb-github]

okay. it's just a small thing for me. If you want I can fix it and maybe save a few minutes of yours. No problem.

[Amruta-Ranade]

Go for it then :) And thank you!

[aniketrb-github]

Go for it then :) And thank you!

Sure. Not a problem. :)

[Amruta-Ranade]

Addressed in #8529