Question

would be grate if someone could help me to translate this into lambda expression or something like.

firstly introduction:
are two tables/objects:

OFFICE 
{officeID,
 NAME,
 another data}

WORKER
{ID,
 officeID,
 NAME}

There is n of offices and m of workers in each off it. (we don’t know exact numbers and we don’t need them)

I know WORKER NAME, I have to get all OFFICES where is at least one worker with such NAME.

So,
SQL will be somethin like this :

SELECT * FROM OFFICE WHERE officeID = (SELECT officeID FROM WORKER where NAME='myName');

(maybe could be another, I’m not sure)

Just, could someone help me get the same using types:OFFICES,WORKER, with lambda expression and IQueryable?

Answer 1

Are you using Navigation Properties? If so, then you can take advantage of those and do either of the two queries below:

context.Office.Where(o => o.Workers.Any(w => w.Name == "myName"));

or

context.Workers.Where(w => w.Name == "myName").Select(w => w.Office).Distinct();