aggregate-functions

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MYSQL Join Confusion

I 开发者_开发技巧have this Exams table and Responses table. I want to fetch all records where Exam for exam = 000663[详细]

2023-04-13 05:17 分类：问答
SQL select only rows with max value on a column [duplicate]

Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. Answers without enough detail may be edited or deleted.[详细]

2023-04-12 09:48 分类：问答
How to get the average of a nested query returned as a single result based on the parent query

Here is another problem I have had to deal with in the last couple of days. I have the following query:[详细]

2023-04-12 01:24 分类：问答
SQL for columns A, B, C: group by A, compute share of B equals C for each A

Database is Oracle. I have a single table with three columns, A, B and C. A is a string column B is an int column[详细]

2023-04-11 23:59 分类：问答
How to convert Dictionary<string, string> to attribute string in LINQ?

I have a collection of key/values in the form of a D开发者_如何学编程ictionary<string, string>.[详细]

2023-04-11 17:50 分类：问答
Running totals in a SQL view

I am trying to get running totals in my View in SQL Server 2008 Here is my tables BankAccounts ------------[详细]

2023-04-11 12:14 分类：问答
Error on Deployment of SQL server 2008 R2 reports to SQL Server 2008, Aggregate functions cannot be nested inside other aggregate functions

I have used SQL Server 2008 R2 for developing my reports, and when I tried to deploy it on hosting server which is SQL server 2008 it displayed an error while deploying a report,[详细]

2023-04-10 13:21 分类：问答
Sql Server - Selecting Logical Results in a Query

Suppose I have a table: 开发者_StackOverflow中文版ACCOUNT It has columns: ID, NAME, BALANCE I want to determine if the SUM of balances of people who has balance more than $ 2,000 is greater than $ 50[详细]

2023-04-08 02:37 分类：问答
In SQL Server Reporting Services, how do I limit Previous function's scope to a group?

I am working on a report that gets, for example purpose, 5 columns from database. Lets say ProductionCountry, Industry, ProductGroup, ProductId, Price.[详细]

2023-04-08 02:01 分类：问答
SQL - Select 'n' greatest elements in group

The SQL MAX aggregate function will allow you to select the开发者_运维知识库 top element in a group. Is there a way to select the top n elements for each group?[详细]

2023-04-07 11:00 分类：问答