MySQL Query
select MAX(os.aggregate_date) as lastMonthDay,os.totalYTD
from (SELECT aggregate_date,Sum(YTD) AS totalYTD
FROM tbl_aggregated_tables
WHERE subscription_type = 'Subcription Income'
GROUP BY aggregate_date) as os
GROUP by MONTH(os.aggregate_date),YEAR(os.aggregate_date)
ORDER BY lastMonthDay;
converted to this LINQ query
var income = context.tbl_aggregated_tables
.Where(s => s.subscription_type == "Subcription Income")
.GroupBy(s => s.aggregate_date)
.Select(result => new
{
date = result.Key,
ytdsum = result.Select(x => x.YTD).Sum()
})
.GroupBy(s => new { month = s.date.Month, year = s.date.Year })
.Select(
// select max data and take its ytdsum value
).ToList();
The purpose of second grouping is to find the max day of each month with a year.
Now, How to select the max date of each month and its ytdsum after the second Grouping?
update
income = context.tbl_aggregated_tables
.Where(s => s.subscription_type == "Subcription Income")
.GroupBy(s => s.aggregate_date)
.Select(result => new
{
date = result.Key,
ytdsum = result.Select(x => x.YTD).Sum()
})
.GroupBy(s => new { s.date.Month, s.date.Year })
.Select(
x => x.Max(s => s.date)
).ToList()
this way it's only return the dates and i could not return the full object of the list including ytdSum.
This should work:
var income = context.tbl_aggregated_tables
.Where(s => s.subscription_type == "Subcription Income")
.GroupBy(s => s.aggregate_date)
.Select(result => new
{
date = result.Key,
ytdsum = result.Select(x => x.YTD).Sum()
})
.GroupBy(s => new { month = s.date.Month, year = s.date.Year })
.Select(
x => x.OrderByDescending(k => k.date).First()
).ToList();
income now is a list of objects, each of them have date and ytdsum
this worked good but it takes much more time than the original mysql query.
var income = context.tbl_aggregated_tables
.Where(s => s.subscription_type == "Subcription Income"
)
.GroupBy(s => s.aggregate_date)
.Select(result => new
{
date = result.Key,
ytdsum = result.Select(x => x.YTD).Sum()
})
.GroupBy(s => new { s.date.Month, s.date.Year })
.Select(
x => x.OrderByDescending(s => s.date)
)
.ToList()
.Select(el => el.FirstOrDefault())
.OrderBy(s=>s.date);
Related
The query works fine, except it only pulls the value where a month has more then zero incident, for example if January had no value, then it doesn't show January. I would like to show all months.
var result = tIncidentReportings
.AsEnumerable()
.GroupBy(c => c.Date.ToString("MMM"))
.Select(g => new { Month = g.Key, Count = g.Count() })
.OrderBy(x => DateTime.ParseExact((x.Month).ToString(), "MMM", CultureInfo.InvariantCulture));
The issue is you are going to have missing months for whatever months don't have any reports. You'll have to check to see which months don't have any and add them manually.
var result = tIncidentReportings
.AsEnumerable()
.GroupBy(c => c.Date.ToString("MMM"))
.Select(g => new { Month = g.Key, Count = g.Count() })
.OrderBy(x => DateTime.ParseExact((x.Month).ToString(), "MMM", CultureInfo.InvariantCulture));
var months =
System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.MonthGenitiveNames.Select(s => s.Substring(0,3)).ToList();
months.foreach(m => {
if(!results.Select(r => r.Month).Contains(m)){
results.Add(new {Month = m, Count = 0};
});
Something like that
Or a rewrite of:
var months = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.MonthGenitiveNames.Select(s => s.Substring(0,3)).ToList();
var reports = months.Select(m =>
new {
Month = m,
Count = tIncidentReportings.AsEnumerable().Where(i => i.Date.ToString("MMM") == m).Count()
}
).OrderBy(x => DateTime.ParseExact((x.Month).ToString(), "MMM", CultureInfo.InvariantCulture)).ToList();
I need to convert the following SQL query to Linq :-
SELECT CODE,SCODE,MAX(SDATE) AS SDATE FROM SHIFTSCHEDULE
WHERE COMPANY = 'ABC'
GROUP BY CODE,SCODE
ORDER BY MAX(SDATE)
DESC
So far, I have tried this :-
var data = ctx.ShiftSchedule.Where(m =>
m.Company == company && m.EmployeeId == item.EmployeeId
)
.GroupBy(m =>
new
{
m.EmployeeId,
m.ShiftId
})
.Select(m =>
new
{
EmployeeId = m.Key.EmployeeId,
ShiftCode = m.Key.ShiftId,
ShiftDate = m.Max(gg => gg.ShiftDate)
}).ToList();
The results i get are :-
Now what i want is to get record or item in this result set which is MaxDate. In the above image the MaxDate is 1st record.
How to get the MAXDATE from the resultset?
This should work:-
var data = ctx.ShiftSchedule.Where(x => x.Company == company
&& x.EmployeeId == item.EmployeeId)
.GroupBy(x => new { x.CODE, x.SCODE })
.Select(x => new
{
CODE = x.Key.CODE,
SCODE = x.Key.SCODE,
SDATE = x.Max(z => z.SDATE)
})
.OrderByDescending(x => x.SDATE).FirstOrDefault();
You can order the resulting collection and fetch the first object using FirstOrDefault.
If you want just MAXDATE, you can only project that.
Just add .OrderByDescending(x => x.ShiftDate).First(); at the end.
OrderByDescending date and then take .First()
var data = ctx.ShiftSchedule.Where(m =>
m.Company == company && m.EmployeeId == item.EmployeeId
)
.GroupBy(m =>
new
{
m.EmployeeId,
m.ShiftId
})
.Select(m =>
new
{
EmployeeId = m.Key.EmployeeId,
ShiftCode = m.Key.ShiftId,
ShiftDate = m.Max(gg => gg.ShiftDate)
}).ToList().OrderByDescending(x => x.ShiftDate).First();
This is the working query i was using in my management studio.
SELECT TOP 5 productCode, SUM(productSales) AS sales
FROM sellingLog
WHERE (salesYear = '2014')
GROUP BY productCode
ORDER BY sales DESC
I want to convert the query above into lambda, but i can't seems to make it works. the lambda still lacks of order by and select the productCode
var topProducts = sellingLog
.Where(s => s.salesYear == 2014)
.GroupBy(u => u.productCode)
.Select(b => b.Sum(u => u.productSales)).Take(5)
.ToList();
foreach(var v in topProduct)
{
//reading 'productCode' and 'sales' from each row
}
var topProducts = sellingLog
.Where(s => s.salesYear == 2014)
.GroupBy(u => u.productCode)
.Select(g => new { productCode = g.Key, sales = g.Sum(u => u.productSales) })
.OrderByDescending(x => x.productCode)
.Take(5)
.ToList();
You can use the .Key with group by to get productCode
var topProducts = sellingLog
.Where(s => s.salesYear == 2014)
.GroupBy(u => u.productCode)
.Select(b => new {u.Key, b.Sum(u => u.productSales)}).Take(5)
.OrderByDescending(b=>b.Sales)
.ToList();
I want to find distinct records in entity framework. My code is as below
var distinctYear = _objCalRepos
.GetDetails()
.Select(o => new CalendarList { Mdate = o.Mdate.Year.ToString() })
.Distinct()
.ToList();
ddlYear.DataSource = distinctYear;
ddlYear.DataTextField = "Mdate";
ddlYear.DataValueField = "Mdate";
ddlYear.DataBind();
Here Distinct not works. It will return all entries(duplicated).
Distinct is not working, probably because CalendarList is not comparable.
Try this:
var distinctYear = _objCalRepos
.GetDetails()
.Select(o => o.Mdate.Year.ToString())
.Distinct()
.AsEnumerable()
.Select(o => new CalendarList { Mdate = o }))
.ToList();
You can use GroupBy
var distinctYear = _objCalRepos
.GetDetails()
.Select(o => new CalendarList { Mdate = o.Mdate.Year.ToString() })
.GroupBy(cl => cl.Mdate )
.Select(g => g.First())
.ToList();
I'm using this query to count number of orders by date. I'm trying to add one more parameter that counts total products for each order, however I can't get it to work atm.
This is the essential part of a method that is suposed to return a list of 3 parameters (Date, TotalOrders and TotalProducts). Im using a Linq query to get a list with total order for each date, im wondering how to add my third parameter to the list "TotalProducts" and if i can do by adding one more search parameter in the Query. The foreach part below do not work propertly, it will return a list of TotalProducts but CreationDate will be the same for ech item in the list. I also have a feeling putting a foreach inside a foreach dosn't seem optimal for this:
var orders = _orderService.SearchOrderStatistics(startDateValue, endDateValue, orderStatus,
paymentStatus, shippingStatus, model.CustomerEmail, model.OrderGuid);
var result = orders.Where(o => o.PaymentStatus == PaymentStatus.Paid)
.GroupBy(g => g.CreatedOnUtc.Date.ToString("yyyyMMdd"))
.Select(s => new { Date = s.Key, Count = s.Count() });
List<GCOrdersModel> TotalOrdersPaid = new List<GCOrdersModel>();
foreach (var g in result)
{
foreach (var opv in orders)
{
GCOrdersModel _Om = new GCOrdersModel(g.Date, g.Count.ToString(), opv.OrderProductVariants.Count.ToString());
TotalOrdersPaid.Add(_Om);
}
}
return TotalOrdersPaid;
To access total products for every orders I must use OrderProductVariants.Count.ToString()
Can I add this parameter to the query?
Thx
You could try this:
return orders.Where(o => o.PaymentStatus == PaymentStatus.Paid)
.GroupBy(g => g.CreatedOnUtc.Date.ToString("yyyyMMdd"))
.Select(s => new GCOrdersModel()
{
Date = s.Key,
Count = s.Count(),
OpvCount = opv.OrderProductVariants.Count.ToString()
})
.ToList();
or
return orders.Where(o => o.PaymentStatus == PaymentStatus.Paid)
.GroupBy(g => g.CreatedOnUtc.Date.ToString("yyyyMMdd"))
.Select(s => new GCOrdersModel(s.Key, s.Count, opv.OrderProductVariants.Count.ToString()))
.ToList();
That way, you don't have to iterate over your result again. And it automatically creates your list of GCOrdersModel.
Edit
Does this work?
return orders.Where(o => o.PaymentStatus == PaymentStatus.Paid)
.GroupBy(g => g.CreatedOnUtc.Date.ToString("yyyyMMdd"))
.Select(s => new GCOrdersModel()
{
Date = s.Key,
Count = s.Count(),
OpvCount = s.OrderProductVariants.Count.ToString()
})
.ToList();
or
return orders.Where(o => o.PaymentStatus == PaymentStatus.Paid)
.GroupBy(g => g.CreatedOnUtc.Date.ToString("yyyyMMdd"))
.Select(s => new GCOrdersModel(s.Key, s.Count(), s.OrderProductVariants.Count.ToString()))
.ToList();
How about:
var opvCount =
opv
.OrderProductVariants
.Count
.ToString();
return
orders
.Where(o => o.PaymentStatus == PaymentStatus.Paid)
.GroupBy(g => g.CreatedOnUtc.Date.ToString("yyyyMMdd"))
.Select(s => new
{
Date = s.Key,
Count = s.Count()
})
.Select(x =>
new GCOrdersModelg(x.Date, g.Count.ToString(), opvCount));