Code Explanation - Please - sql

Question

Sorry - I hope you don't mind me asking this question but I am new to SQL - Could someone comments on what these lines mean in this code:
select b.recipeuuid
,b.proditemuuid
,b.proditemvalueuuid
into #rectemp
from rec_recipe as a
inner join rec_recipevalue as b
on b.recipeuuid=a.recipeuuid
and b.[value] in ('Green','Yellow')
inner join rec_proditem as c
on c.proditemuuid=b.proditemuuid
inner join rec_proditemvalue as d
on d.proditemuuid=c.proditemuuid
and d.proditemvalueuuid=b.proditemvalueuuid
and d.[name]='SetupType'
;
update a
set a.[value]='1'
from rec_recipevalue as a
inner join #rectemp as b
on b.recipeuuid=a.recipeuuid
and b.proditemuuid=a.proditemuuid
and b.proditemvalueuuid=a.proditemvalueuuid
where a.[value] in ('Green','Yellow')
;
update a
set a.[name]='Normal'
from rec_proditemvalue as a
inner join #rectemp as b
on b.proditemuuid=a.proditemuuid
and b.proditemvalueuuid=a.proditemvalueuuid
where a.[name]='SetupType'
;
drop table #rectemp;
I understand that the general idea of this code. It is about how to update (or change) the value for two different columns: Attribute & Color. These two items are located in two different tables before I joined them with the appropriate UUID.
The update should take a place only when the Attribute = ‘SetupType’ and the Color = ‘Green’ or ‘Yellow’
I would like to change these two values to:
Attribute = ‘Normal’ and the
Color = ‘1’

Answer 1

select b.recipeuuid
,b.proditemuuid
,b.proditemvalueuuid
into #rectemp
from rec_recipe as a
inner join rec_recipevalue as b
on b.recipeuuid=a.recipeuuid
and b.[value] in ('Green','Yellow')
inner join rec_proditem as c
on c.proditemuuid=b.proditemuuid
inner join rec_proditemvalue as d
on d.proditemuuid=c.proditemuuid
and d.proditemvalueuuid=b.proditemvalueuuid
and d.[name]='SetupType'
;
***#rectemp is a temp table. Data imported into the table***
update a
set a.[value]='1'
from rec_recipevalue as a
inner join #rectemp as b
on b.recipeuuid=a.recipeuuid
and b.proditemuuid=a.proditemuuid
and b.proditemvalueuuid=a.proditemvalueuuid
where a.[value] in ('Green','Yellow')
;
***Column Value is updated to 1 based on Value is Green or yellow***
update a
set a.[name]='Normal'
from rec_proditemvalue as a
inner join #rectemp as b
on b.proditemuuid=a.proditemuuid
and b.proditemvalueuuid=a.proditemvalueuuid
where a.[name]='SetupType'
;
*** Name column is updated to Normal ***
drop table #rectemp;
*** Temp Table is dropped***