Add information and example of combining SHOW DATABASES with regular Cypher

[Hunterness]

Also add a comment about if the input to SHOW DATABASES $db is null.

TODO:

• Does it need any markers for being Cypher 25 only?
• Update 2026.XX to relevant version once released
• Do I need to add anything to https://neo4j.com/docs/operations-manual/current/changes-2025-2026/? Or do we still add the administration command updates to the https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ page?

[Hunterness]

Add suggestions for Cypher 25 markers based on how it looks in the Cypher manual

[renetapopova]

Thanks, @Hunterness. I left some comments.

[renetapopova]

• Do I need to add anything to https://neo4j.com/docs/operations-manual/current/changes-2025-2026/? Or do we still add the administration command updates to the https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ page?

I think we need to document them here https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ for sure, because these are new additions to the Cypher language syntax and possibilities.

[renetapopova]

I think it looks good now. ✅

[Hunterness]

I'd like to keep this around until all the moves from Cypher manual to Operations manual have been done so that I can make sure that all parts of my Cypher manual PR have been covered or add the missing bits to this PR instead of having to open a new one for the missed parts.

[Hunterness]

@renetapopova what about my last remaining checklist item in the description? Do you have any input on that?

Do I need to add anything to https://neo4j.com/docs/operations-manual/current/changes-2025-2026/? Or do we still add the administration command updates to the https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ page?

[renetapopova]

@renetapopova what about my last remaining checklist item in the description? Do you have any input on that?

Do I need to add anything to https://neo4j.com/docs/operations-manual/current/changes-2025-2026/? Or do we still add the administration command updates to the https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ page?

I've already answered that above.

[Hunterness]

@renetapopova what about my last remaining checklist item in the description? Do you have any input on that?

Do I need to add anything to https://neo4j.com/docs/operations-manual/current/changes-2025-2026/? Or do we still add the administration command updates to the https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ page?

I've already answered that above.

I did not see that comment/answer, not sure why 🤦

[Hunterness]

• Do I need to add anything to https://neo4j.com/docs/operations-manual/current/changes-2025-2026/? Or do we still add the administration command updates to the https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ page?

I think we need to document them here https://neo4j.com/docs/cypher-manual/current/deprecations-additions-removals-compatibility/ for sure, because these are new additions to the Cypher language syntax and possibilities.

I have added it to that page on my Cypher manual PR already: https://github.com/neo4j/docs-cypher/pull/1528/files#diff-62c381212132b601e7a6cb3fbdee89aa2cc21b1a9b7f103c943d51a981e19392

[neo4j-docops-agent]

Thanks for the documentation updates.

The preview documentation has now been torn down - reopening this PR will republish it.