The problem is: how to get one million numbers to table with less time? We can solve this problem using different approaches but not all of them are quick. Let’s go now step by step and see how different approaches perform.
First idea for many guys is using WHILE. It is robust and primitive approach … Read More →
How to run Python Script in Power BI
import pandas as pd
data = [['Alex',10],['Bob',12],['Claire',13]]
df = pd.DataFrame(data, columns=['Name','Age'], dtype=float)
Kimball Technical DW/BI System Architecture
The Kimball technical system architecture separates the data and
processes comprising the DW/BI system into the backroom extract,
transformation and load (ETL) environment and the front room
presentation area, as illustrated in the following diagram.
Figure 1: Kimball technical system architecture diagram.
The Kimball technical system architecture focuses on the following components:
Backroom ETL … Read More →
Mapping Data Flows in ADF provide a way to transform data at scale
without any coding required. You can design a data transformation job in
the data flow designer by constructing a series of transformations.
Start with any number of source transformations followed by data
transformation steps. Then, complete your data flow with sink to … Read More →
SUMMARY : In this mini-tutorial, you will learn how to query data from multiple tables using T-SQL JOINS statement.
A SQL JOIN combines records from two tables.A JOIN locates related column values in the two tables.A query can contain zero, one, or multiple JOIN operations.INNER JOIN is the same as JOIN; the keyword INNER … Read More →
The Lorenz system is a system of ordinary differential equations first studied by Edward Lorenz. It is notable for having chaotic solutions for certain parameter values and initial conditions. In particular, the Lorenz attractor is a set of chaotic solutions of the Lorenz system. In popular media the 'butterfly effect' stems from the real-world implications … Read More →
Analysez les risques dès le début du projet
Un projet se déroule généralement en 5 étapes :
La formalisation du besoin.
L’étude de faisabilité.
1. La formalisation du besoin
C’est le moment où vous posez les bases de votre projet. Pour les gros projets, vous pourrez être amené à réaliser une étude d’opportunité mais le plus souvent pour … Read More →
TLDR: I will show you how to set up a continuous deployment process for your SSDT Projects. To make that job easier I made SSDT Continuous Deployment-Enabled project template for Visual Studio 2017 which was also published on Visual Studio Marketplace. I will guide you through the process of importing your database schema into the … Read More →
Azure Analysis Services is a fully managed platform as a service (PaaS) that provides enterprise-grade data models in the cloud. Use advanced mashup and modeling features to combine data from multiple data sources, define metrics, and secure your data in a single, trusted tabular semantic data model. The data model provides an easier and faster … Read More →
Gaps and islands problems involve missing values in a sequence. Solving the gaps problem requires finding the ranges of missing values, whereas solving the islands problem involves finding the ranges of existing values. The sequences of values in gaps and islands problems can be numeric, such as a sequence of order IDs, some of which … Read More →
When I first started to play with DAX, one of the functions that seemed to confuse me more than it should, was how to add ranking to my data. It didn’t seem to matter what the data was, if I followed the online documentation sometimes it would work, while other times the function would return … Read More →
Quality testing is one of those things that few of us enjoy but is vital to maintaining the trust of people who consume our reports. One of my former bosses, who was a former McKinsey consulting that I worked with during my MBA internship, taught me many valuable lessons about Excel and financial modeling. … Read More →
To keep up to date with all the technologies in SQL Server, the DBA or developer who wants to stay ahead is faced with the struggle of constant learning.
The SQL Server Stairways is our solution to this problem. Designed to smooth out even the steepest learning curve, each Stairway is a SQL tutorial series focused … Read More →
The Query’s goal is :
Find the top 5 Locations
List the users who live in those top 5 Locations, alphabetized by their DisplayName
There are a LOT of ways I could write this query, but for the purpose of this post, I’m only going to contrast common table expressions (CTEs) versus temp tables:
We’re talking about a relatively … Read More →
The SQL language offers the following types of JOIN:
The result of a JOIN does not depends on the presence of a relationship in the data model. You can use any column of a table in a JOIN condition.
In DAX there are two ways you can obtain a JOIN behavior. First, you can … Read More →
In this article (Italian), we have already discussed Continuous Integration and DLM. We described the main reasons for putting a database under source control and for testing our databases. In this article, we are going to discuss a real scenario of SQL Server unit testing with the tSQLt framework.
What Is Unit Testing
In computer programming, unit … Read More →
Automating Analysis Services Tabular Projects - Part 1: Deployment
My team recently starting using Microsoft’s Tabular Model databases at work, as an intermediate layer between an operational data store and the end users who consume this data from Power BI. Tabular Models are an OLAP technology, providing an in-memory data cube, with measures being defined using … Read More →
We are going a step beyond the traditional methods of developing a data warehouse by adopting CI practices, which are more prevalent for API (.NET) based applications. It has been long pending for data warehouse teams to catch up on the modern software engineering practices. With the emergence of Visual Studio Online (VSTS) & SQL … Read More →
In Analysis Services, almost every object and workload is programmable, and often there is more than one approach to choose from. Options include writing managed code, script, or using open standards like XMLA and MSOLAP if your solution requirements preclude using the .NET framework.
What you can accomplish in code
Typical programming scenarios include server and database … Read More →