I have this SQL query which gives the output as 15.but, when I converted the same query in Linq,it gives an output as 72.
select sum(DATEDIFF(day,LeaveBreakup.StartDate,LeaveBreakup.EndDate)+1) as totalNoOfDays from LeaveApplication
inner join Employee
on LeaveApplication.Employee=Employee.Id
inner join Team
on Employee.Team=Team.Id
inner join LeaveBreakup
on LeaveApplication.Id=LeaveBreakup.LeaveApplication
inner join LeaveTypeDetail
on LeaveBreakup.LeaveType=LeaveTypeDetail.LeaveType
where Employee.Team=5 and LeaveStatus!=0 and LeaveBreakup.StartDate between '01-01-2016' and '01-31-2016' and LeaveBreakup.WhichHalf=0
var Stafflist = (from LApp in db.LeaveApplications
join Emp in db.Employees
on LApp.Employee equals Emp.Id
join Tm in db.Teams
on Emp.Team equals Tm.Id
join LBrk in db.LeaveBreakups
on LApp.Id equals LBrk.LeaveApplication
join LTD in db.LeaveTypeDetails
on LBrk.LeaveType equals LTD.LeaveType
where Emp.Team == 5 && LApp.LeaveStatus != 0 && LBrk.StartDate >= d1 && LBrk.StartDate <= d2 && LBrk.WhichHalf == 0
select DbFunctions.DiffMinutes(LBrk.StartDate, LBrk.EndDate)).Sum() / 60;
Related
I have a Linq Query but it gives above error I guess due to NULL as I have Module,Block and semester as nullable int when semester column is having value than Module and Block would be null and when Module and block would be null than semster is having value How to handle the below query.
var test1 = (from c in db.StudentCoursesAssigned
join e in db.Years
on c.Year_Id equals e.Id into table1 from e in table1.DefaultIfEmpty()
join cc in db.Courses
on c.Course_Id equals cc.Course_Id into table2 from cc in table2.DefaultIfEmpty()
join g in db.grades
on c.Grade equals g.Id into table3 from g in table3.DefaultIfEmpty()
join m in db.Moduels
on c.Module_Id equals m.Id into table4 from m in table4.DefaultIfEmpty()
join p in db.Programs
on c.Program_Id equals p.Id into table5 from p in table5.DefaultIfEmpty()
join b in db.Blocks
on c.Block_Id equals b.Id into table6 from b in table6.DefaultIfEmpty()
join s in db.Semesters
on c.Semster_Id equals s.Semester_Id into table7 from s in table7.DefaultIfEmpty()
join ss in db.Students
on c.Student_id equals ss.Student_Id into table8 from ss in table8.DefaultIfEmpty()
select new
{
Student_Name=ss.Student_FName,
Course=cc.Course_Name,
Active=c.Active,
Course_start_date=c.Enrolment_Start,
Course_End_date=c.Enrolment_End,
Grade=g.Name,
Module=m.Name,
Program=p.Program_Title,
Year=e.Id,
Semester=s.Semester_Title,
blocks=b.Id
}).ToList();
That is the right Linq query which solves
var test1 = (from c in db.StudentCoursesAssigned
join e in db.Years
on c.Year_Id equals e.Id into table1 from e in table1.DefaultIfEmpty()
join cc in db.Courses
on c.Course_Id equals cc.Course_Id into table2 from cc in table2.DefaultIfEmpty()
join g in db.grades
on c.Grade equals g.Id into table3 from g in table3.DefaultIfEmpty()
join m in db.Moduels
on c.Module_Id equals m.Id into table4 from m in table4.DefaultIfEmpty()
join p in db.Programs
on c.Program_Id equals p.Id into table5 from p in table5.DefaultIfEmpty()
join b in db.Blocks
on c.Block_Id equals b.Id into table6 from b in table6.DefaultIfEmpty()
join s in db.Semesters
on c.Semster_Id equals s.Semester_Id into table7 from s in table7.DefaultIfEmpty()
join ss in db.Students
on c.Student_id equals ss.Student_Id into table8 from ss in table8.DefaultIfEmpty()
select new
{
Student_Name = ss.Student_FName == null ? "No Value" : ss.Student_FName,
Course = cc.Course_Name == null ? "No Value" : cc.Course_Name,
Active = c.Active ,
Course_start_date = c.Enrolment_Start,
Course_End_date = c.Enrolment_End ,
Grade = g.Name == null ? "No Value" : g.Name,
Module = m.Name == null ? "No value" : m.Name,
Program=p.Program_Title == null ? "No Value" : p.Program_Title,
Year=e.Name,
Semester=s.Semester_Title == null ? "No Value" : s.Semester_Title,
blocks=b.Name == null ? "No Value":b.Name,
student_Id=ss.Student_Id,
id=c.Id,
}).ToList();
```
I am trying to convert this tSql command to linq query.
I want to group this columns.
Can you help me?
select vUnit.FK_Unit_ID , Unit.unitNumber, unit.unitTitle , title.featureTitleName
from unit.UnitFeatureValue vUnit
inner join unit.Unit on vUnit.FK_Unit_ID = Unit.ID
inner join unit.FeatureTitle title on vUnit.FK_FeatureTitle_ID = title.ID
where vUnit.FK_Unit_ID = 15 and title.canMoreSelect = 1
group by vUnit.FK_Unit_ID ,unit.unitNumber, unit.unitTitle , title.featureTitleName
var query = (
from v in dbContext.UnitFeatureValue
join u in dbContext.Unit on v.FK_Unit_ID equals u.ID
join t in dbContext.FeatureTitle on v.FK_FeatureTitle_ID equals t.ID
where v.FK_Unit_ID == 15 && t.canMoreSelect == 1
select new {
v.FK_Unit_ID,
u.unitNumber,
u.unitTitle,
t.featureTitleName,
}).Distinct();
something like this
var result = (from v in vUnit
join u in unit on v.FK_Unit_ID equals u.ID
join t in title on v.FK_FeatureTitle_ID equals t.ID
where v.FK_Unit_ID == 15 and t.canMoreSelect == 1
select new { v.FK_Unit_ID , u.unitNumber, u.unitTitle , t.featureTitleName }).ToList();
I've got a table called IssueStatuses and another table called Issues. Issues has a StatusID and SubStatusID, both of which are from the IssueStatuses table which has an additional field that states if it's a SubStatus or not, like so:
IssueStatuses
IssueStatusID
IssueStatus
IsSubStatus
I'm trying to get a list of SubStatuses for a particular list of Issues. In SQL it's:
SELECT iss.IssueStatus, COUNT(iss.IssueStatus) AS Total
FROM Issues AS Issues
INNER JOIN Rooms r ON Issues.RoomID = r.RoomID
INNER JOIN Locations l ON l.LocationID = r.LocationID
INNER JOIN Customers c ON l.CustomerID = c.CustomerID
INNER JOIN (SELECT * FROM IssueStatuses WHERE IsSubStatus = 0) ist ON Issues.IssueStatusID = ist.IssueStatusID
INNER JOIN (SELECT * FROM IssueStatuses WHERE IsSubStatus = 1) iss ON Issues.IssueSubStatusID = iss.IssueStatusID
WHERE c.Customer = 'ABC'
AND l.Location = 'MySite'
GROUP BY iss.IssueStatus
but I"m having trouble converting it to LINQ. The desired output would be something like:
IssueStatus | Total
-------------------
Open 15
Delayed 25
On Time 8
Here's what I've tried with LINQ:
var query = from i in Issues
join r in Rooms on i.RoomID equals r.RoomID
join l in Locations on r.RoomID equals l.LocationID
join c in Customers on l.CustomerID equals c.CustomerID
where i.IssueStatusID == (from ist in IssueStatuses
where ist.IsSubStatus == false
select ist)
&& i.IssueSubStatusID == (from iss in IssueStatuses
where iss.IsSubStatus == true
select iss)
&& c.Custome == "ABC"
&& l.Location == "MySite"
group i by i.IssueStatus
but I know it's wrong because LINQPad throws an error stating:
can't convert int to type Models.IssueStatus
What I need to do is use iss.IssueStaus to group on but I can't access it. Can someone tell me what I'm doing wrong?
How about this (untested but I should be close):
var query = from i in Issues
join r in Rooms on i.RoomID equals r.RoomID
join l in Locations on r.LocationID equals l.LocationID
join c in Customers on l.CustomerID equals c.CustomerID
join ist in IssueStatuses on i.IssueStatusID equals ist.IssueStatusID
join iss in IssueStatuses on i.IssueSubStatusID equals iss.IssueStatusID
where !ist.IsSubStatus && iss.IsSubStatus
&& c.Customer == "ABC"
&& l.Location == "MySite"
group i by iss.IssueStatus into g
select new {IssueStatus = g.Key, Total = g.Count()}
Your two inner from statements return objects and not IDs ... select the ID you need like ist.IssueStatusID:
var query = from i in Issues
join r in Rooms on i.RoomID equals r.RoomID
join l in Locations on r.RoomID equals l.LocationID
join c in Customers on l.CustomerID equals c.CustomerID
where (from ist in IssueStatuses
where ist.IsSubStatus == false
select ist.IssueStatusID).Contains(i.IssusStatusID)
&& (from iss in IssueStatuses
where iss.IsSubStatus == true
select iss.IssueStatusID).Contains(i.IssueSubStatusID)
&& c.Customer == "ABC"
&& l.Location == "MySite"
group i by i.IssueStatus
I'd like to know why INNER JOINs are generated instead of LEFT and why the whole view is selected before join instead of just adding LEFT JOIN view.
I'm trying to post a table of information which is spread out over several tables. Basically I want to search by the date and return all the information for events happening today, yesterday, this month - whatever the user selects. The query is quite long. I added DefaultIfEmpty to all the tables except the main one in an attempt to get LEFT JOINs but it just made a mess.
using (TransitEntities t = new TransitEntities())
{
var charters = from c in t.tblCharters
join v in t.tblChartVehicles.DefaultIfEmpty()
on c.Veh
equals v.ChartVehID
join n in t.tblNACharters.DefaultIfEmpty()
on c.Dpt.Substring(c.Dpt.Length - 1)
equals SqlFunctions.StringConvert((double)n.NAID)
join r in t.tblChartReqs.DefaultIfEmpty()
on c.ChartReqID
equals r.ChartReqID
join f in t.tblCharterCustomers.DefaultIfEmpty()
on c.Dpt
equals (f.DptID == "NONAFF" ? SqlFunctions.StringConvert((double)f.CustID) : f.DptID)
join d in t.tblChartReqDocs.DefaultIfEmpty()
on c.Attach
equals SqlFunctions.StringConvert((double)d.DocID)
join s in t.tblChartSupAttaches.DefaultIfEmpty()
on c.SupAttach
equals SqlFunctions.StringConvert((double)s.DocID)
join p in (from e in t.v_EmpData select new {e.UIN, e.First, e.Last}).DefaultIfEmpty()
on c.TakenUIN
equals p.UIN
where c.BeginTime > EntityFunctions.AddYears(DateTime.Now,-1)
select new
{
ChartID = c.ChartID,
Status = c.Status,
...
Website = r.Website,
};
//select today's events
gvCharters.DataSource = charters.Where(row => (row.BeginTime.Value >= midnight && row.BeginTime.Value < midnight1));
This results in very convoluted SQL:
SELECT
[Extent1].[ChartID] AS [ChartID],
[Extent1].[Status] AS [Status],
...
[Join5].[Website] AS [Website],
FROM [dbo].[tblCharters] AS [Extent1]
INNER JOIN (SELECT [Extent2].[ChartVehID] AS [ChartVehID], [Extent2].[Descr] AS [Descr]
FROM ( SELECT 1 AS X ) AS [SingleRowTable1]
LEFT OUTER JOIN [dbo].[tblChartVehicles] AS [Extent2] ON 1 = 1 ) AS [Join1] ON ([Extent1].[Veh] = [Join1].[ChartVehID]) OR (([Extent1].[Veh] IS NULL) AND ([Join1].[ChartVehID] IS NULL))
INNER JOIN (SELECT [Extent3].[NAID] AS [NAID], [Extent3].[Descr] AS [Descr]
FROM ( SELECT 1 AS X ) AS [SingleRowTable2]
LEFT OUTER JOIN [dbo].[tblNACharter] AS [Extent3] ON 1 = 1 ) AS [Join3] ON ((SUBSTRING([Extent1].[Dpt], ((LEN([Extent1].[Dpt])) - 1) + 1, (LEN([Extent1].[Dpt])) - ((LEN([Extent1].[Dpt])) - 1))) = (STR( CAST( [Join3].[NAID] AS float)))) OR ((SUBSTRING([Extent1].[Dpt], ((LEN([Extent1].[Dpt])) - 1) + 1, (LEN([Extent1].[Dpt])) - ((LEN([Extent1].[Dpt])) - 1)) IS NULL) AND (STR( CAST( [Join3].[NAID] AS float)) IS NULL))
INNER JOIN (SELECT [Extent4].[ChartReqID] AS [ChartReqID], [Extent4].[Event] AS [Event], [Extent4].[ContactName] AS [ContactName], [Extent4].[ContactPhone] AS [ContactPhone], [Extent4].[Website] AS [Website]
FROM ( SELECT 1 AS X ) AS [SingleRowTable3]
LEFT OUTER JOIN [dbo].[tblChartReq] AS [Extent4] ON 1 = 1 ) AS [Join5] ON ([Extent1].[ChartReqID] = [Join5].[ChartReqID]) OR (([Extent1].[ChartReqID] IS NULL) AND ([Join5].[ChartReqID] IS NULL))
INNER JOIN (SELECT [Extent5].[CustID] AS [CustID], [Extent5].[Dpt] AS [Dpt], [Extent5].[DptID] AS [DptID]
FROM ( SELECT 1 AS X ) AS [SingleRowTable4]
LEFT OUTER JOIN [dbo].[tblCharterCustomers] AS [Extent5] ON 1 = 1 ) AS [Join7] ON ([Extent1].[Dpt] = (CASE WHEN (N'NONAFF' = [Join7].[DptID]) THEN STR( CAST( [Join7].[CustID] AS float)) ELSE [Join7].[DptID] END)) OR (([Extent1].[Dpt] IS NULL) AND (CASE WHEN (N'NONAFF' = [Join7].[DptID]) THEN STR( CAST( [Join7].[CustID] AS float)) ELSE [Join7].[DptID] END IS NULL))
INNER JOIN (SELECT [Extent6].[DocID] AS [DocID], [Extent6].[FileName] AS [FileName]
FROM ( SELECT 1 AS X ) AS [SingleRowTable5]
LEFT OUTER JOIN [dbo].[tblChartReqDocs] AS [Extent6] ON 1 = 1 ) AS [Join9] ON ([Extent1].[Attach] = (STR( CAST( [Join9].[DocID] AS float)))) OR (([Extent1].[Attach] IS NULL) AND (STR( CAST( [Join9].[DocID] AS float)) IS NULL))
INNER JOIN (SELECT [Extent7].[DocID] AS [DocID], [Extent7].[FileName] AS [FileName]
FROM ( SELECT 1 AS X ) AS [SingleRowTable6]
LEFT OUTER JOIN [dbo].[tblChartSupAttach] AS [Extent7] ON 1 = 1 ) AS [Join11] ON ([Extent1].[SupAttach] = (STR( CAST( [Join11].[DocID] AS float)))) OR (([Extent1].[SupAttach] IS NULL) AND (STR( CAST( [Join11].[DocID] AS float)) IS NULL))
INNER JOIN (SELECT [Extent8].[First] AS [First], [Extent8].[Last] AS [Last], [Extent8].[UIN] AS [UIN]
FROM ( SELECT 1 AS X ) AS [SingleRowTable7]
LEFT OUTER JOIN (SELECT
[v_EmpData].[First] AS [First],
[v_EmpData].[Last] AS [Last],
[v_EmpData].[Legal] AS [Legal],
[v_EmpData].[Name] AS [Name],
[v_EmpData].[Email] AS [Email],
[v_EmpData].[UIN] AS [UIN],
[v_EmpData].[UserNM] AS [UserNM],
[v_EmpData].[Worker] AS [Worker],
[v_EmpData].[SUPERVISORNUM] AS [SUPERVISORNUM],
[v_EmpData].[Supervisor] AS [Supervisor],
[v_EmpData].[EmpArea] AS [EmpArea],
[v_EmpData].[Title] AS [Title],
[v_EmpData].[FullName] AS [FullName],
[v_EmpData].[HireDate] AS [HireDate],
[v_EmpData].[WORKERTYPENM] AS [WORKERTYPENM],
[v_EmpData].[Birth] AS [Birth],
[v_EmpData].[HOMESTREET] AS [HOMESTREET],
[v_EmpData].[HOMECITY] AS [HOMECITY],
[v_EmpData].[HOMEZIP] AS [HOMEZIP],
[v_EmpData].[HOMESTATE] AS [HOMESTATE],
[v_EmpData].[PicID] AS [PicID],
[v_EmpData].[WorkPhone] AS [WorkPhone],
[v_EmpData].[HomePhone] AS [HomePhone],
[v_EmpData].[WorkCellPhone] AS [WorkCellPhone]
FROM [dbo].[v_EmpData] AS [v_EmpData]) AS [Extent8] ON 1 = 1 ) AS [Join13] ON ([Extent1].[TakenUIN] = [Join13].[UIN]) OR (([Extent1].[TakenUIN] IS NULL) AND ([Join13].[UIN] IS NULL))
WHERE ([Extent1].[BeginTime] > (DATEADD (year, -1, SysDateTime())))
AND ('C' <> [Extent1].[Status])
AND ([Extent1].[BeginTime] >= '11/28/2012 12:00:00 AM')
AND ([Extent1].[BeginTime] < '11/29/2012 12:00:00 AM')
This is what my original SQL query looked like and what I was hoping it would be closer to:
SELECT
ChartID,
c.Status,
...
r.Website As Website,
FROM tblChartersNew c
LEFT JOIN (SELECT [Dpt],[DptID] FROM [DRVRDiscipline].[dbo].[tblCharterCustomers] Where Valid=1 and DptID <> 'NONAFF' UNION SELECT Dpt, CONVERT(nvarchar,CustID) AS DptID FROM [DRVRDiscipline].[dbo].[tblCharterCustomers] Where Valid=1 and DptID = 'NONAFF') f
ON RTRIM(c.Dpt) = f.DptID LEFT JOIN [tskronos].WfcSuite.dbo.VP_ALLPERSONV42 p ON p.PersonNUM = c.TakenUIN
LEFT JOIN tblChartVehicles v ON v.ChartVehID = c.Veh
LEFT JOIN tblNACharter n ON CAST(n.NAID AS varchar) = RIGHT(c.Dpt, LEN(c.Dpt)-1)
LEFT JOIN tblChartReq r
ON r.ChartReqID = c.ChartReqID
WHERE CONVERT(datetime,CONVERT(char(10),c.BeginTime,101)) = (SELECT TOP 1 CONVERT(datetime,CONVERT(char(10),BeginTime,101)) from tblChartersNew WHERE CONVERT(datetime,CONVERT(char(10),BeginTime,101)) >= CONVERT(datetime,CONVERT(char(10),GETDATE(),101)) ORDER BY BeginTime)
AND NOT c.ChartReqID IS NULL
ORDER BY BeginTime, ISNULL(f.Dpt,c.Dpt)
I also add a Select New on the view to avoid selecting all of the columns when I only need three but it didn't seem to make a difference. Instead of adding LEFT JOIN v_EmpData it adds LEFT OUTER JOIN and then selects all of the columns in the view. It seems to be ignoring the Select New.
I'd really like to transition to using Linq to Entities for the majority of my queries because intellisense makes it so much easier to make sure it's right and to have variations of queries without having to have separate functions for each but maybe I need to stick with plain old SQL. I know just enough to make a big mess. Any suggestions?
For complex queries like what you need.
I would suggest looking into FunctionImport.
MSDN Function Import
This would save you the headache of creating a LINQ that would be 1:1 to your expected generated SQL.
Here's my SQL query:
Select <a bunch of columns>
from fields f
join Table1 c1 on c1.fieldID = f.ID and c1.year = 2014
join Table2 fRes on f.ID = fRes.fieldID
join Table3 stst on f.ID = stst.fieldID
join Table4 model on c1.ID = model.yearID
left join Table5 fA on f.ID = fA.fieldID and fA.year = 2014
left join Table6 nA on f.ID = nA.fieldID and nA.year = 2014
where fA.sourcename IS NULL and nA.Sourcename IS NULL
LINQ to SQL:
from f in BasicDataAccess.Data.FieldsList
join c1 in BasicDataAccess.Data.Table1List on f.ID equals c1.fieldID
join fRes in BasicDataAccess.Data.Table2List on f.ID equals fRes.fieldID
join soilTst in BasicDataAccess.Data.Table3List on f.ID equals soilTst.fieldID
join modelRsNM in BasicDataAccess.Data.Table4List on c1.ID equals modelRsNM.YearID
join fA in BasicDataAccess.Data.Table5List on f.ID equals fA.fieldID into group1
from g1 in group1.Where(fA => fA.Year == reportYear).DefaultIfEmpty()
join nA in BasicDataAccess.Data.Table6List on f.ID equals nA.fieldID into group2
from g2 in group2.Where(nA => nA.Year == reportYear).DefaultIfEmpty()
where g1.sourceName == null && g2.sourceName == null
Issue: the query when executed throws Nullreference exception was unhandled..Object reference not set to an instance of an object error..
What am I missing? Is it possible to reference the left outer join table in where clause? Please help!
As far as I can see, this line
from g1 in group1.Where(fA => fA.Year == reportYear).DefaultIfEmpty()
can produce null if there's no rows. In this case, when you try to filter it (where g1.sourceName == null) you'll get null reference (because g1 is null).