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PD Series - Change default value

Change the default value in PowerDesigner or add a new one

At FastChangeCo, the data modelers within the Data Management Center of Excellence (DMCE) team are constantly designing new database objects to store data. One of the data modelers on the team is Xuefang Kaya. When she takes a new user story/task, she usually models multiple tables, their columns, and specifies a data type for each column.

For example, if a column needs to store the timestamp for an event, Xuefang sets the date/time data type for that column (in that case, it even depends on the database in each case). If additional columns have to store names and addresses, it sets the columns to the ‘text’ data type.

  • Written by Dirk Lerner
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Knowledge Gap 2020

I, Stephan, am very happy that I'm invited to give a presentation at the Knowledge Gap 2020 in Munich.

My presentation is about advanced techniques in Fact-Oriented Modeling.

Often data models are built with a technical focus, because they need to be delivered fast or must meet various technical requirements. Therefore, the business aspect and the meaning of objects and relationships are swept under the table. But then the business domain later hardly understands the data model and has problems to work with it in own applications or reports – which often results in a redesign of the data model and renewed time and cost expenditures.

  • Written by Dirk Lerner
  • Hits: 3674

Webinar - Model driven decision making

An EXASOL Webinar serie

We are back again after a long time, with a new webinar. The last one, we (Mathias and I) did together is almost four years ago. Time flies by! What's up this time?

The fictitious company FastChangeCoTM has developed a possibility not only to manufacture Smart Devices, but also to extend the Smart Devices as wearables in the form of bio-sensors to clothing and living beings. With each of these devices, a large amount of (sensitive) data is generated, or more precisely: by recording, processing and evaluating personal and environmental data.

  • Written by Dirk Lerner
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Enterprise Data & BI & Analytics 19 #EDBIA

I am pleased to say that I will be participating at this year’s Enterprise Data & Business Intelligence and Analytics Conference Europe 18-22 November 2019, London. I will be speaking on the subject ‘From Conceptual to Physical Data Vault Data Model’ and (for sure) on my hobby horse subject temporal data: ‘Send Bi-Temporal Data from Ground to Vault to the Stars’. See my abstracts for the sessions below.

  • Written by Dirk Lerner
  • Hits: 4935

Data Modeling Zone EU/US 19 #DMZone

OK, for those of you who just want to grab a promotion code... I'll make it short 😂:

TEDAMOH

As a speaker at both conferences I give you 15% on the DMZ EU and 20% on the DMZ US. You can register here.

For those of you who are also interested in what I'm going to talk about, a few more informations:

  • Written by Dirk Lerner
  • Hits: 5051
  • Conferences
  • Data Architecture
  • Data Modeling
  • Bitemporal Data

    If everything would happen at the same time, there would be no need to store historic data. We, the consumers of data, would know each and everything at the same instant. Beside all the other philosophical impacts, if time wouldn’t exists, is data still necessary?

    (Un)fortunately time exists and data architects, data modelers and developers have to deal with it in the world of information technology.

    In this category about temporal data I will collect all my blogposts about this fancy topic.

  • Secret Spice