how to join these individual queries into a single query

All we need is an easy explanation of the problem, so here it is.

I have two individual queries, which I have to join them into single query.

1st query:

I have a parameter called name in a request. When I give that name, it should determine its id. Example: If I give VS-ABC in a request it should determine it’s id=1.

stu_details table

[{id:1,name:"VS-ABC"]} -- sample input record to refer

select * from stu_details where name="VS-ABC"

2nd query:

select * from PR
where pr_id in (select pr_id from PRS where id =1)

Here id =1 and I am giving it manually, but I wanted these queries to run in a single shot and dynamically. Whenever I pass a request "name" parameter then it should determine that id and pass in the second query inside IN query.

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

SELECT [DISTINCT] pr.* 
FROM pr
JOIN prs ON pr.pr_id = prs.pr_id
JOIN stu_details ON stu_details.id = prs.id
WHERE stu_details.name = 'VS-ABC';

Whether DISTINCT is needed or not depends on the data.

PS. Do not use double quote chars " for literals quoting, you must use single quote chars ' for this purposes.

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

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