aggregate
When is aggregate initialisation valid in C++11?
Lets say we have the following code: #include <iostream> #include <string> struct A开发者_高级运维[详细]
2023-03-11 13:58 分类:问答Reducing the granularity of a data set
I have an in-memory cache which stores a set of information by a certain level of aggregation - in the Students example below let\'s say I store it by Year, Subject, Teacher:[详细]
2023-03-11 11:03 分类:问答MS Access get Average only if one record meets criteria
In MS Access I am trying to get an average of data but only when the last record of each set is larger than a value. almost have it but cant get the last part. So my data looks like so:[详细]
2023-03-11 10:35 分类:问答Aggregating data with a self-joined table in SQL Server 2008r2
I\'m trying to provide reporting functionality on a typical restaurant type database. I describe the specifics of the problem below, but in a nutshell I need to be able retrieve aggregate data (sums a[详细]
2023-03-11 02:04 分类:问答How should I enforce relationships and constraints between aggregate roots?
I have a couple questions regarding the relationship between references between two aggregate roots in a DDD model. Refer to the typical Customer/Order model diagrammed below.[详细]
2023-03-08 08:25 分类:问答How do public websites built using DDD keep from having one main aggregate root
I\'m trying to use domain driven design while creating a website that is publicly accessible. One problem I\'m having is trying to figure out what the aggregate roots should be for my model. I have a[详细]
2023-03-08 06:57 分类:问答How to include BIT type column in SELECT part with out including it on the GROUP BY in T-SQL?
Here is my T-SQL query SELECT ProductID, VendorID, ProductName= MAX(ProductName), VendorName = MAX(VendorName),[详细]
2023-03-06 18:28 分类:问答book count per author for filtered book list in django
Short question. I have two models: class Author(models.Model): name = models.CharField(max_length=250) class Book(models.Model):[详细]
2023-03-04 15:48 分类:问答How can I use LINQ and lambdas to perform a bitwise OR on a bit flag enumeration property of objects in a list?
I have a collection of objects, and each object has a bit field enumeration property. What I am trying to get is the logical OR of the bit field property across the entire collection. How can I do thi[详细]
2023-03-04 07:25 分类:问答open raster in R! and some statistical operation
I would like to open raster files (in ASCII or TIFF format), aggregate their cells and after this operation count correlation between values in this new raster file and another one. Unfortunately I do[详细]
2023-03-02 04:51 分类:问答