### What changes were proposed in this pull request?
Document DROP DATABASE statement in SQL Reference
### Why are the changes needed?
Currently from spark there is no complete sql guide is present, so it is better to document all the sql commands, this jira is sub part of this task.
### Does this PR introduce any user-facing change?
Yes, Before there was no documentation about drop database syntax
After Fix
### How was this patch tested?
tested with jenkyll build
Closes#25554 from sandeep-katta/dropDbDoc.
Authored-by: sandeep katta <sandeep.katta2007@gmail.com>
Signed-off-by: Xiao Li <gatorsmile@gmail.com>
## What changes were proposed in this pull request?
This is a initial PR that creates the table of content for SQL reference guide. The left side bar will displays additional menu items corresponding to supported SQL constructs. One this PR is merged, we will fill in the content incrementally. Additionally this PR contains a minor change to make the left sidebar scrollable. Currently it is not possible to scroll in the left hand side window.
## How was this patch tested?
Used jekyll build and serve to verify.
Closes#25459 from dilipbiswal/ref-doc.
Authored-by: Dilip Biswal <dbiswal@us.ibm.com>
Signed-off-by: gatorsmile <gatorsmile@gmail.com>
