Combining multiple data points into a single data point. This usually is used in reference to SQL and usually to an aggregate function of some sort.

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sqlite group_concat error while executing query

I have table: CREATE TABLE www ( Col_1 VARCHAR, Col_2 VARCHAR ); select count(*) from www; --1496 And I have error: "Error while executing query: aggregate function are not allowed in ...
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33 views

Postgres - Querying Min, Max and getting associated columns data specific to those result of those rows

I have query in which returns averaged values by site and month. What I want to know is the min and max of those monthly averages by site and (the difficult part) the month when each occurred. Here ...
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48 views

Aggregate sampler function for programmer express predictions

Are there any SQL-standard or DBMS implementation that offers "sample aggregator" for predictably repeated columns? I will explain, see bold text at the end. PS: this question is about "little ...
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1answer
34 views

Is it possible to use a column value as the argument to a hypothetical-set aggregate function?

Say I have a table like the one described below. Table "public.foo" Column | Type | Modifiers ...
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1answer
151 views

Type with nested table in oracle

I want to create a type with a nested table. I have a table called assignment_tbl which I want to put a type assignment_status. This assignment_status contains primitive types but also contains a ...
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20 views

Access Web App query 3 Tables with aggregatios - Need a workaround

I'm designing an Access 2016 Web App for inventoring our computers. The problem I have is with a query where I want to get the CPUCore-amount and RAM-Amount for each PC. The computer-value in RAM ...
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12 views

Ratio per Group in PostgreSQL

If I have rows like this: lec1 major1 class1 10 lec1 major2 class1 40 lec1 major1 class2 30 lec1 major3 class3 35 lec2 major1 class3 15 lec2 major3 class3 10 And I need it to combine the ratio ...
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26 views

Adding a column to aggregated data where new value only applies to a subset of the aggregation

Having trouble explaining this. I have a table like this: Label | Value A | 3 B | 1 C | 4 And another like this: Label | Value | ID A | 1 | ID1 A | 1 | ID2 C ...
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684 views

How to calculate running total based on dynamic values?

I need to calculate the running total in which the target column is changing along with the time. Its something which aws does. Charging based for only what you use. So how do I aggregate sum of ...
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MySQL Get first and last day of multiple records

I have a table HC_RSPI_data: | RADIO_TYPE | HOP | TOWARDS | RSPI | TP_NAME | DATE_TIME_END | TIME_LENGTH | RLTM_min | RLTM_max | ...
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262 views

Pentaho Kettle (Data Intergration) MongoDB Aggregation

I'm using kettle v5.2 which support the aggregation pipleline in MongoDB when using MongoDB input the query works for small data set but I need to use option allowDiskUse to the query can't figure ...
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Multischema view for postgres , querying multiple databases

Im managing SaaS app where each customer has a separate database (Postgres 9.3) . I need to figure out the best way to aggregate and query this data ( READ-only ). I know postgres has problems with ...
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Join and aggregate result and insert blanks for missing appendants

Consider these two simplified tables: CREATE TABLE "sources" ( "id" serial NOT NULL, "name" text NOT NULL, CONSTRAINT "sources_pkey" PRIMARY KEY ("id") ); CREATE TABLE "values" ( ...
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263 views

MySQL aggregation count performance

I have a table with about 30 million records, and I'm doing a query where I can group by field Year and count the results for that year. The table structure looks like: id | year | amount The ...
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33 views

MySQL: Calculations and Triggers across multiple tables

I'm new to sql and I'm having trouble with a calculation involving two of my tables. I have a table, payroll, which looks something like this: CREATE TABLE payroll ( id INT(6) UNSIGNED AUTO_INCREMENT ...
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33 views

MongoDB slow aggregation for 30 millions of documents

I have MongoDB cluster that include 3 Shard servers based on m3.large type, config server and mongos. There I have a database on 30G with one shard collection with 30 millions of documents. Each ...
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33 views

Mongo aggregation query on time series data

I am storing some user frequency data on site. Data looks like this { "uid" : "5b2db719-1943-408f-ec06-f88f663f5d56", "pgAccessTime" : NumberLong("1457073369030"), "day" : ...
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Is there a way to automatically set triggers to update a field that is computed as an aggregation of other fields?

Let's say that I have these tables: user, task, and submission. A user can create a submission which will be scored by the system, which will assign a value to submission.score. Now, everytime a ...
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35 views

How to pull sales for every single month based on my query below using ORACLE

So I am working on a report right now that pulls customer information, and sales for a particular date range, who used a PROMOTION CODE. My current query pulls all the data I need and gives me a sum ...
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45 views

Aggregate function within CASE or Joins

Database - MySQL I have 3 tables Table1 - Order Columns -OrderId,OrderDate Contraints- PrimaryKey-OrderId Table2 - Product Columns-ProductId, InsertDate, ...
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Need help with Oracle Query for totaling fields with separate clauses, any feedback highly appreciated!

I am stuck on an issue that has been causing my mind to ramble for the last couple of days. DETAILS ABOUT REPORT This report is to identify the following details based off of the CUSTOMER_ID new ...
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35 views

limit aggregate function across join

I have a facts table, and each fact has one-or-more distributors in fact_distributors. A distributor is an entity, and for reporting purposes entities are grouped together into an entity_group via ...
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Joining one table with multiple tables for aggregate functions possible?

I am trying to get this seemingly simple looking query to work : SELECT c.id, c.name, count(chc.id) as contacts_count, count(cha.id) as addresses_count FROM (customers c LEFT JOIN ...
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81 views

parent / child aggregate column

To start with, here is my fiddle. I have a parent / child relationship setup, I have them ordered by who they belong to, and I want to have a column called lastUpdated in which the parent has the ...
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273 views

Saving String as unique number in Mongo

I have a field in my collection which is a String in nature. When i run aggregation for this field in data it takes considerable time in aggregation. Total 6 million records are in collection which ...
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262 views

index of aggregate value with fast update?

Is it possible for me to index the sum of a particular table column, such that future lookups will not have to scan the entire table? This table will grow to be very large and a sum of the entire ...
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31 views

Order by Like Value and Count

My Name field values are "Name1 (AB)", "Name2 (AB)", "Name3 (CD)", "Name4 (EF)", etc. Is it possible to count the total "%(AB)" and the total "%(CD)" etc...in one query or will it require a sub query? ...
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SQL Server Aggregate Function: “Get First Available”?

Does anyone know of a "get first available" aggregate function for SQL Server 2014? I would like to use such a function on a dynamic pivot table to speed up performance. The situation is that I only ...