(Google sheets) Query and return multiple tables from url inject - google-sheets

Question

I use the JSON data from a Google spreadsheet, for 2 mobile applications (iOS and Android). The same information can be outputted using HTML or XML, in this case I am using HTML so the information shown (from the spreadsheet) can be understood by everyone. The only logical way to do this is without Authentication (O’Auth) is through public URL Injects. Information about what I’m talking can be found here. In order to understand what I’m asking, you have to actually click the links and see for yourself. I do not know what to “call” some of the things I’m asking as Google’s documation is poor, no fault of my own.
In my app I have a search feature that queries the spreadsheet (USING A URL REQUEST) along the lines of this,
https://docs.google.com/spreadsheets/d/1yyHaR2wihF8gLf40k1jrPfzTZ9uKWJKRmFSB519X8Bc/gviz/tq?tqx=out:html&tq=select+A,B,C,D,E+where+(B+contains"Cat")&gid=0
I select my columns (A, B, C, D, and, E) and ask (Google) that only the rows where column B contains the word cat be return. Again I’m stressing the point that this is done via a URL address (inject being the proper term). I CANNOT use almost any function/formulas that would normally work within a spreadsheet like, ArrayFormula or ImportRange. In fact I only access to 10 language clauses (Read link from before). I have a rather well knowledge of spreadsheets and databases, and as the URL method of getting information from them is similar they are in NO way the same thing.
Now, I would like to point out this part within the URL
tq?tqx=out:html&tq=select+A,B,C,D,E+where+(B+contains"Cat")&gid=0
Type of output, HTML in this case
tqx=out:html
The start of query
&tq=
Select columns A-E
select+A,B,C,D,E
For returning specific information about Cat
where+(B+contains"Cat")
This is probably the most important part of my question. This is used for specifying what table (Tab) is being queried.
&gid=0
If the gid is changed from gid=0 to gid=181437435 the data returned is from the spreadsheets second table. Instead of having to make 2 requests to search both tables is there a way to do both in one request? (like combining the 2) <— THIS IS WHAT I’M ASKING.
There is a AND clause that I have tried all over the url
select+A,B,C,D,E+where+(B+contains%20"Cat")&gid=181437435+AND+select+A,B,C,D,E+where+(B+contains%20"Cat")&gid=0
I have even flipped the gid around and put in other places but it seems to only go by the last one (gid) in the url, and no matter what is done only 1 table is returned. Grouping is allowed by the way. If that doesn’t clear my question up then let me know where you’re lost. Also I would have posted more URLs for easy access but I am kind of on this 2 URL maximum program.

Answer 1

If I understand your requirement, indeed it is, with syntax like this for example:
=ArrayFormula(QUERY({Sheet1!A1:C4;Sheet2!B1:D4},"select * order by Col1 desc"))
The ; stacks one array above the other (, for side by side).
My confusions is with "URL Query Language" as what here is called Google Query Language (there is even the tag though IMO almost all those Qs belong on Web Applications - including this one, by my understanding!) is not confined to use with URLs.
In the example above the sheet references might be replaced with data import functions.