Q
Problem solve Get help with specific problems with your technologies, process and projects.

# Creating aggregate entries where no base data exists

I have a table with columns: "name", "date", "hour", "calls" (and other not interesting ones). I need to group...

the results by name, date and hour, summing calls. I also wish to have record, even if in the original table, there aren't such records. For example, if for a certain name1 and date1, I have 2 calls at 9, 4 calls at 11, 5 calls at 12, and so on, I wish to have this result set:

```
"name" "date" "hour" "calls"
name1   date1   9      2
name1   date1   10     0
name1   date1   11     4
name1   date1   12     5
...
```

There are several ways we can solve this problem. This time, I found a "helper" table useful. But first, here's our Calls table:

```create table Calls
( Name varchar(10),
CallDate date,
CallHour numeric(2)
)

```
```create table Hours
( Hour numeric(2) );

begin
insert into Hours values (0);
insert into Hours values (1);
insert into Hours values (2);
insert into Hours values (3);
insert into Hours values (4);
insert into Hours values (5);
insert into Hours values (6);
insert into Hours values (7);
insert into Hours values (8);
insert into Hours values (9);
insert into Hours values (10);
insert into Hours values (11);
insert into Hours values (12);
insert into Hours values (13);
insert into Hours values (14);
insert into Hours values (15);
insert into Hours values (16);
insert into Hours values (17);
insert into Hours values (18);
insert into Hours values (19);
insert into Hours values (20);
insert into Hours values (21);
insert into Hours values (22);
insert into Hours values (23);
commit;
end;
```
```select Name, CallDate, Hour,
( select count(*) from Calls t
where t.Name = c.Name
and t.CallDate = c.CallDate
and t.CallHour = h.Hour ) "Total Calls"
from (select distinct Name, CallDate from Calls) c,
Hours h

Name    CallDate       Hour   Total Calls
------- -------------- ------ -----------
```

Is there a solution? We'll need a table of hours (our helper table): And here's our SQL with the results:
This was last published in November 2002

## Content

Find more PRO+ content and other member only offers, here.

#### Have a question for an expert?

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

#### Start the conversation

Send me notifications when other members comment.

## SearchDataManagement

• ### Hyperledger Fabric offers path to enterprise blockchain future

Blockchain arose from bitcoin, but it's looking to find a place in the enterprise. Frameworks like Hyperledger Fabric could ...

• ### MongoDB 4.0 takes ACID transactions to multi-document level

MongoDB is taking a deeper step into SQL-style processing waters with a 4.0 update that brings increased support for ...

• ### Data lake concept needs firm hand to pay big data dividends

Data lakes pose technology deployment and data management challenges that can leave analytics users high and dry if the ...

• ### AI functionality limited today but could be a game-changer

Limited AI capabilities could soon give way to technology that is truly transformative for enterprises, surpassing the overhyped ...

## SearchSAP

• ### SAP's Barry Padgett on future of SAP Ariba Network

In this Q&A, new SAP Ariba President Barry Padgett discusses the future of procurement and the experience he will bring to Ariba ...

• ### Avoiding SAP indirect access woes requires good faith

Some customers are concerned that SAP will hit them for indirect access licensing fees, but they can avoid trouble if they act in...

• ### ControlPanelGRC app eases Steelcase's compliance pain

When Steelcase's SAP environment grew in size and complexity, it turned to Symmetry ControlPanelGRC to save time, have more ...

## SearchSQLServer

SQL Operations Studio simplifies routine administration of SQL Server and Azure SQL databases, making database development and ...

• ### Meltdown and Spectre fixes eyed for SQL Server performance issues

Microsoft has responded to the Spectre and Meltdown chip vulnerabilities with patches and other fixes. But IT teams need to sort ...

• ### Five SQL Server maintenance steps you should take -- ASAP

Putting off SQL Server administration tasks can lead to database problems. Enact these often-neglected maintenance items to help ...

## TheServerSide.com

• ### How DevOps concepts eluted from cloud computing and service platforms

The popularity of DevOps can be traced back to the emergence of cloud computing. As programmers began scripting their ...

• ### Pluralsight IQ, Stack Overflow boost developer street cred

Tying the Pluralsight IQ skills test to the Stack Overflow Developer Story helps developers measure their technical skills and ...

• ### Why this quantum computing breakthrough is a security risk

Quantum computing will void pretty much all security encryption techniques and open the door to hackers. Here's how to protect ...

## SearchDataCenter

• ### IBM Power9 servers seek market inroads to AI, cloud

IBM follows up its first Power9 server with a raft of systems designed to appeal to a wider array of markets -- most notably, AI ...

• ### Evaluate read-intensive and write-intensive SSD use cases

Consider write wear, performance and other factors when choosing between read-intensive, write-intensive and mixed-use ...

• ### Some hyper-converged infrastructure use cases pose pitfalls

Hyper-converged infrastructure adoption is skyrocketing, but that doesn't mean that the technology is the best choice for every ...

## SearchContentManagement

• ### Content management in the cloud a main theme in 2018

The future of content management resides in the cloud and with AI, as several 2018 conferences will assure you.

• ### Six things to know about today's SharePoint implementations

As companies migrate their on-premises Microsoft SharePoint sites to the cloud, here are some things they should know about the ...

• ### Upgrades for the SharePoint Online portal

As more organizations migrate SharePoint sites to the cloud, Microsoft has increased at-a-glance dashboard data and analytics to ...

## SearchHRSoftware

• ### Social media key to future of learning and development

Employees aren't just wasting time on social media; some are learning the career skills that will take them to the next level. ...

• ### Limeade releases new employee engagement software

HR tech news roundup: Employee engagement software vendor Limeade expands platform and releases inclusion module for large ...

• ### Don't overlook the many benefits of Microsoft Excel for HR

The maligned spreadsheet tool is no substitute for enterprise apps like HRMS and people analytics, but it will do in a pinch and ...

Close