I have this so far:
var query = (from g in this.Context.Groups
where g.ID == groupID &&
g.TaxId == groupTaxId
select g.Group_K);
Then the SQL query I want to add is this:
select zipCode from ADDRESSES where ADDRESS_K in
(select ADDRESS_K from GROUPADDRESS
where GROUP_K = "is in Group_K found above "
and address_type = "address type variable I pass into this method"
and ACTIVE = 1)
I can't figure it out how to add a new LINQ query or update the one I have to account for the new SQL I am trying to add. Thanks for help.
How about this one?
var group_key = (from g in this.Context.Groups
where g.ID == groupID
&& g.TaxId == groupTaxId
select g.Group_K);
var query = (from a in this.Context.Addresses
join ga in this.Context.GroupAddress on a.Address_K equals ga.Address_K
where (group_key.Contains(ga.Group_K) && a.ZipCode == "whatever passed from method" && ga.Address_Type == "whatever passed from your method")
select a);
IN statement is equivalent to Contains method call in LINQ to Entities:
var query = from a in this.Context.Addresses
where (from g in this.Context.Groups
where g.ID == groupID && g.TaxId == groupTaxId
select g.Group_K).Contains(a.Address_K);
select a.ZipCode;
You could also rewrite your query to use JOIN instead of nested queries:
var query = from a in this.Context.Addresses
join g in this.Context.Groups on a.Address_K equals g.Group_K
where g.ID == groupID && g.TaxId == groupTaxId
select a.ZipCode;
Related
I would like to use Average function with Count in my Linq to EF query. So if I have to explain what I try to realize with my code part in t-sql for more clear understanding, You can take look below them,
select s.SalesPointId, count(*) as ipp
from ScoreItem si
inner join Score s on s.Id = si.ScoreId
where si.ResearchGroupType = 0 and si.IsValidForSalesPoint = 1
group by s.SalesPointId
select avg(ipp)
from (
select s.SalesPointId, count(*) as ipp
from ScoreItem si
inner join Score s on s.Id = si.ScoreId
where si.ResearchGroupType = 0 and si.IsValidForSalesPoint = 1
group by s.SalesPointId
)
As a consequence I have wrote below code in Linq query,
List<CvmNameAndValue> AnatolianSalesHeadshipIPPScore = (from si in db.ScoreItem
join s in db.Score on si.ScoreId equals s.Id
join sp in db.SalesPoint on s.SalesPointId equals sp.Id
where (si.ResearchGroupType == ResearchGroupType.ScoreCard && si.IsValidForSalesPoint && sp.CompanyId == ContextData.User.CompanyId && s.ProjectPeriodId == ProjectPeriodId && spIds.Contains(sp.Id))
group s by s.SalesPointId into g
select new CvmNameAndValue
{
Name = SystemSetting.Label_AnatolianSalesHeadshipIPPScore,
Value = g.Average(x => db.Score.Count()).ToString()
})
.ToList();
retVal.Data.DataGroup = AnatolianSalesHeadshipIPPScore.ToList();
return retVal;
But, Unfortunately they didn't return same result for me, so if you have any suggestion about my logic mistakes, please feel to free and share with me,
Finally I have solved my problem, so if you need such as thing, it can be solve your problem,
double AnatolianSalesHeadshipIPPScore = 0;
AnatolianSalesHeadshipIPPScore = (from si in db.ScoreItem
join s in db.Score on si.ScoreId equals s.Id
join sp in db.SalesPoint on s.SalesPointId equals sp.Id
where (si.ResearchGroupType == ResearchGroupType.ScoreCard && si.IsValidForSalesPoint && sp.CompanyId == ContextData.User.CompanyId && s.ProjectPeriodId == ProjectPeriodId)
group si by s.SalesPointId into g
select new
{
sid = g.Key,
count = g.Count()
}).Average(m => m.count);
I want to sum records using Group by from the all data inside "result view".
can anyone guide me for this.!
Here is My Code
var tData1 = (from i in _data.Transactions
join y in _data.DeviceInformations on i.DeviceInfoId equals y.DeviceInfoId
join u in _data.AccountDevices on y.DeviceInfoId equals u.DeviceInfoId
where y.Active == true && u.AccountId == 1000001 && u.Active == true
group i by i.DeviceInfoId into g
select g.OrderByDescending(t => t.DateCreated)).ToList();
foreach (var xCo in tData1)
{
//I am getting Data in xCo
}
Based on #Nayeem Mansoori solution you can try this.
var tData1 = (from i in _data.Transactions
join y in _data.DeviceInformations on i.DeviceInfoId equals y.DeviceInfoId
join u in _data.AccountDevices on y.DeviceInfoId equals u.DeviceInfoId
where y.Active == true && u.AccountId == 1000001 && u.Active == true
group i by i.DeviceInfoId into g
select new {Id = DeviceInfoId, sum = g.Sum(x=>x.DeviceInfoId)};
I have an SQL query which returns all accounts and in the top of the result table I have accounts which share same documents. Query below works just fine, but there is a problem implementing the same logic on linq.
select
(
select
COUNT(*)
from Signs X, Signs Y
where X.AccountID = 2 and Y.AccountID = A.ID and X.DocID = Y.DocID
),
*
from
Accounts A
where
A.ID != 2
order by 1 desc
var result = from A in Accounts
where A.ID != 2
select new { Count = (from X in Signs
from Y in Signs
where X.AccountID == 2 &&
Y.AccountID == A.ID &&
X.DocID == Y.DocID
select 1).Count(),
A };
Note: You could probably change the subquery to a join on DocID but i've left as is, so you can see the similarity between the SQL and the LINQ.
Example with a join:
var result = from A in Accounts
where A.ID != 2
select new { Count = (from X in Signs
join Y in Signs on X.DocID equals Y.DocID
where X.AccountID == 2 &&
Y.AccountID == A.ID
select 1).Count(),
A };
When LINQ translates the below syntax to SQL, the (inner) where clause gets moved to the outer-most query. That's super-unfriendly to the database. I wrote this like Hibernate's HQL (is this appropriate?), and I've written SQL for many moons.
Can anyone help explain what gives, or point me in the way of a resolution?
var rc = (
from dv in (
from dv_j in (
from x in adc.JobManagement
join j in adc.Job on x.JobId equals j.JobId
join js in adc.JobStatus on j.StatusId equals js.JobStatusId
join cm in adc.ClientManagement on j.ClientId equals cm.ClientId
join o in adc.User on cm.UserId equals o.UserId
join jm in adc.JobManagement on j.JobId equals jm.JobId
where
(x.UserId == aid || cm.UserId == aid)
&& (j.StatusDate == null || j.StatusDate >= getFromDate())
&& (jm.ManagementRoleCode == MR_MANAGER)
select new
{
j.JobId,
Job = j.InternalName == null ? j.ExternalName : j.InternalName,
JobStatusDate = j.StatusDate,
JobStatus = js.Code,
Owner = o.Username,
Role = jm.ManagementRoleCode
})
join s in adc.Submission on dv_j.JobId equals s.JobId into dv_s
from s in dv_s.DefaultIfEmpty()
select new
{
dv_j.JobId,
dv_j.Job,
dv_j.JobStatusDate,
dv_j.JobStatus,
dv_j.Owner,
dv_j.Role,
s.SubmissionId,
s.CandidateId,
s.SubmissionDate,
StatusDate = s.StatusDate,
StatusId = s.StatusId
})
join c in adc.Candidate on dv.CandidateId equals c.CandidateId into dv_c
join ss in adc.SubmissionStatus on dv.StatusId equals ss.SubmissionStatusId into dv_ss
from c in dv_c.DefaultIfEmpty()
from ss in dv_ss.DefaultIfEmpty()
orderby
dv.StatusId == null ? dv.StatusDate : dv.JobStatusDate descending,
dv.Job,
c.LastName,
c.NickName,
c.FirstName
select new Projects
{
Id = dv.JobId,
Project = dv.Job,
Submitted = dv.SubmissionDate,
Candidate = FormatIndividual(c.LastName, c.FirstName, c.NickName),
Status = dv.StatusId == null ? ss.Code : dv.JobStatus,
StatusDate = dv.StatusId == null ? dv.StatusDate : dv.JobStatusDate,
Role = dv.Role,
Owner = dv.Owner
});
Try breaking down the one statement into two. This would work as it cannot move the where to a place that doesn't exist yet. This does make multiple round trips to the database, but it is better than having most of several large tables being joined then culled. I would try this:
var inMemoryTable = (
from x in adc.JobManagement
join j in adc.Job on x.JobId equals j.JobId
join js in adc.JobStatus on j.StatusId equals js.JobStatusId
join cm in adc.ClientManagement on j.ClientId equals cm.ClientId
join o in adc.User on cm.UserId equals o.UserId
join jm in adc.JobManagement on j.JobId equals jm.JobId
where
(x.UserId == aid || cm.UserId == aid)
&& (j.StatusDate == null || j.StatusDate >= getFromDate())
&& (jm.ManagementRoleCode == MR_MANAGER)
select new
{
j.JobId,
Job = j.InternalName == null ? j.ExternalName : j.InternalName,
JobStatusDate = j.StatusDate,
JobStatus = js.Code,
Owner = o.Username,
Role = jm.ManagementRoleCode
});
var rc = (
from dv in (
from dv_j in inMemoryTable
join s in adc.Submission on dv_j.JobId equals s.JobId into dv_s
from s in dv_s.DefaultIfEmpty()
select new
{
dv_j.JobId,
dv_j.Job,
dv_j.JobStatusDate,
dv_j.JobStatus,
dv_j.Owner,
dv_j.Role,
s.SubmissionId,
s.CandidateId,
s.SubmissionDate,
StatusDate = s.StatusDate,
StatusId = s.StatusId
})
join c in adc.Candidate on dv.CandidateId equals c.CandidateId into dv_c
join ss in adc.SubmissionStatus on dv.StatusId equals ss.SubmissionStatusId into dv_ss
from c in dv_c.DefaultIfEmpty()
from ss in dv_ss.DefaultIfEmpty()
orderby
dv.StatusId == null ? dv.StatusDate : dv.JobStatusDate descending,
dv.Job,
c.LastName,
c.NickName,
c.FirstName
select new Projects
{
Id = dv.JobId,
Project = dv.Job,
Submitted = dv.SubmissionDate,
Candidate = FormatIndividual(c.LastName, c.FirstName, c.NickName),
Status = dv.StatusId == null ? ss.Code : dv.JobStatus,
StatusDate = dv.StatusId == null ? dv.StatusDate : dv.JobStatusDate,
Role = dv.Role,
Owner = dv.Owner
});
How do I write a sub-select in LINQ.
If I have a list of customers and a list of orders I want all the customers that have no orders.
This is my pseudo code attempt:
var res = from c in customers
where c.CustomerID ! in (from o in orders select o.CustomerID)
select c
How about:
var res = from c in customers
where !orders.Select(o => o.CustomerID).Contains(c.CustomerID)
select c;
Another option is to use:
var res = from c in customers
join o in orders
on c.CustomerID equals o.customerID
into customerOrders
where customerOrders.Count() == 0
select c;
Are you using LINQ to SQL or something else, btw? Different flavours may have different "best" ways of doing it
If this is database-backed, try using navigation properties (if you have them defined):
var res = from c in customers
where !c.Orders.Any()
select c;
On Northwind, this generates the TSQL:
SELECT /* columns snipped */
FROM [dbo].[Customers] AS [t0]
WHERE NOT (EXISTS(
SELECT NULL AS [EMPTY]
FROM [dbo].[Orders] AS [t1]
WHERE [t1].[CustomerID] = [t0].[CustomerID]
))
Which does the job quite well.
var result = (from planinfo in db.mst_pointplan_info
join entityType in db.mst_entity_type
on planinfo.entityId equals entityType.id
where planinfo.entityId == entityId
&& planinfo.is_deleted != true
&& planinfo.system_id == systemId
&& entityType.enity_enum_id == entityId
group planinfo by planinfo.package_id into gplan
select new PackagePointRangeConfigurationResult
{
Result = (from planinfo in gplan
select new PackagePointRangeResult
{
PackageId = planinfo.package_id,
PointPlanInfo = (from pointPlanInfo in gplan
select new PointPlanInfo
{
StartRange = planinfo.start_range,
EndRange = planinfo.end_range,
IsDiscountAndChargeInPer = planinfo.is_discount_and_charge_in_per,
Discount = planinfo.discount,
ServiceCharge = planinfo.servicecharge,
AtonMerchantShare = planinfo.aton_merchant_share,
CommunityShare = planinfo.community_share
}).ToList()
}).ToList()
}).FirstOrDefault();
var res = (from c in orders where c.CustomerID == null
select c.Customers).ToList();
or Make Except()