Question

_{Actually I think I might have fixed it, gonna do some testing, I wll post my solution if it works.}

I am migrating an older DB system over to LINQ, I’m having trouble converting a few of the SQL statements though:

SELECT * FROM cities 
INNER JOIN deals ON cities.cityId = deals.CityID 
INNER JOIN countries ON cities.countryID = countries.CountryId 
WHERE deals.endDate >= (someDate) 
   AND countries.CountryId = (1) 
   AND deals.soldout = (false)

I’ve done some research, but I can’t get it to work. Here is the LINQ statement I came up with:

var deals = from d in db.deals
                     join city in db.cities on d.CityID equals city.cityId
                     join country in db.countries on city.countryID equals country.CountryId
                     where d.endDate > DateTime.Today && country.CountryId == 1 && d.soldOut == false
                     select d;

Is there some particular way to use 2 joins in LINQ?

_{Sorry, I had a formatting error: the statement is meant to select all the deals that have a city who’s countryID = 1}

Answer 1

You do not need the 2nd join if you have a country code for the city…

var deals = from d in db.deals
                 join city in db.cities on d.CityID equals city.cityId
                 where d.endDate > DateTime.Today &&
                 city.CountryId == 1 && d.soldOut == false
                 select d;