How to write SQL query format in C#

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Hello experts, I have a series of codes in SQL Query format, in this code I joined 3 tables together.
here is my code:

select distinct(t.UserNO),t.UserName,s.TotalDays from User_Tbl as t 
join( select ChartNo from Chart_Rest_Tbl) as f ON t.UserNO = f.ChartNo join(select ChartNO, sum(Days) as TotalDays from Chart_Rest_Tbl
group by ChartNo) AS s ON f.ChartNO = s.ChartNo

Now I want to write the above code in C# format, like this code(I mean how to write above code in c# format,The code below is just an example and I have nothing to do with the code below):

var st = (from s in db.Worker_Tbl
   join o in db.User_Tbl on s.WorkerNO equals o.UserNO
   where o.UserNO == txtsearch1
   select new { s.WorderId, o.UserName, s.WorkerNO, s.GPEntireDate, s.GPExpiredDate, s.GPCount }).ToList();

What I have tried:

i don't know how to write

SUM(Days)

in C# format or how write

distinct

thank you for your time <3

Posted 14-Dec-23 8:01am

Max Speed 2022

Updated 14-Dec-23 8:12am

v4

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PIEBALDconsult · Accepted Answer · 2023-12-14T09:07:00

Solution 2

C#

string sql = @"
select distinct(t.UserNO),t.UserName,s.TotalDays from User_Tbl as t 
join( select ChartNo from Chart_Rest_Tbl) as f ON t.UserNO = f.ChartNo join(select ChartNO, sum(Days) as TotalDays from Chart_Rest_Tbl
group by ChartNo) AS s ON f.ChartNO = s.ChartNo
" ;

Posted 14-Dec-23 9:07am

PIEBALDconsult

M Imran Ansari · Accepted Answer · 2023-12-14T08:41:00

Here is the LINQ format in C# from your SQL query.

C#

var query = from t in dbContext.User_Tbl
            join f in dbContext.Chart_Rest_Tbl.Select(x => x.ChartNo).Distinct() on t.UserNO equals f
            join s in dbContext.Chart_Rest_Tbl.GroupBy(x => x.ChartNo)
                                               .Select(g => new { ChartNO = g.Key, TotalDays = g.Sum(x => x.Days) })
            on f equals s.ChartNO
            select new
            {
                UserNO = t.UserNO,
                UserName = t.UserName,
                TotalDays = s.TotalDays
            };
var result = query.Distinct().ToList();

To modify or further reference, you can try the below tools to convert your SQL query to LINQ format in C#:
LINQPad - The .NET Programmer's Playground[^]
Home page - Linqer[^]