aggregation

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calling constructor of a class member in constructor

Can I call constructor of a member in my Class\'s constructor? let say If I have a member bar of class type foo in my class MClass. Can I call constr开发者_如何学Gouctor of bar in MClass\'s construct[详细]

2023-04-13 02:14 分类：问答
WCF Data Service Method for Aggregation with filter

I need to aggreate some data of my wcf data service in order do something like a \"monthly report\". Afaik aggregation is not possible via the odata protocol. I guess I have to implement my own WebGet[详细]

2023-04-11 17:32 分类：问答
Calculating rank on an aggregate column in a Hibernate SQLProjection

I am trying to write a query to calculate a rank column based upon an aggregate column. The query is an SQLProjection as part of a Hibernate Criteria query. Here is what I have tried:[详细]

2023-04-07 16:57 分类：问答
SQL - Query Multiple Aggregations based on DateTime - MySQL

This is a complex one. But I have a table which has a DATETIME field, and a few other int and float fields which need to be summed and averaged. We want to do the summing and averaging on this table b[详细]

2023-04-07 03:32 分类：问答
ASP.NET MVC 3 - Web Application - Efficiently Aggregate Data

I am running an ASP.NET MVC 3 web application and would like to gather statistics such as: How often is a specific product viewed[详细]

2023-04-06 10:55 分类：问答
How to average/sum data in a day in SQL Server 2005

I\'m trying to average data in SQL Server 2005 in a day. Here is what my database look like this if I use simple query as[详细]

2023-04-05 16:24 分类：问答
Django - How to annotate QuerySet using multiple field values?

I have a model called \"Story\" that has two integer fields called \"views\" and \"votes\". When I retrieve all the Story objects I would like to a开发者_StackOverflow社区nnotate the returned QuerySet[详细]

2023-04-02 08:54 分类：问答
Help with MYSQL Query Aggregating counts (alternative to three sub-queries)

I am trying to output the total content views from my stats table and group by the year... My stats table is INNODB and has 8M lines and growing...[详细]

2023-03-31 11:54 分类：问答
Does storing aggregated data go against database normalization?

On sites like SO, I\'m sure it\'s absolutely necessary to store as much aggregated data as possible to avoid performing all those complex queries/calculations on every page load. For instance, storing[详细]

2023-03-21 11:38 分类：问答
SSAS TimeSpan in Aggregation

I have a timespan in a datawarehouse representi开发者_开发知识库ng time spent by a user doing a task (not a time dimension, but a measure). In SQL I have this set as datetime. When this is pulled into[详细]

2023-03-20 15:11 分类：问答