Many times we will see that a query is delayed and we would like to know what is delaying it. To do this we need to know the wait types and what each of them means. Specifically… read more
What is Tabular model and how it differs from Multidimensional in SQL Server Analysis Services
Microsoft in Analysis Services for the creation of Business Intelligence (Data Warehouse) beyond the use of Multidimensional Cubes also provides the Tabular model approach. Tabular models are new, faster to build and easier to use.… read more
How to bulk data into database using Oracle Data Pump (impdp)
Many times we will need to keep the table data and their metadata (packages, procedures, functions, etc.) so that we can then import them into the same or a different system. In a previous article we saw the use of Oracle Data… read more
Useful VBA routines in Microsoft Excel (Part 2)
In continuation of the previous article we will see some more VBA (Visual Basic for Applications) routines that we can use in Microsoft Excel. These routines can be executed by calling them on a button or after some… read more
How to install SQL Server on Linux
In this article we will see how easy it is to install SQL Server 2019 on a machine with a Linux operating system and more specifically on a Red Hat distribution. We will also see how we connect and how we can… read more
How we collect blocking queries via Extended Event and how we read its data
In an earlier article we saw how we create an Extended Event to see queries with a long duration. In this article we will create an Extended Event that records blockings. All we need to do is create it… read more
The Great Database Battle – SQL Server vs Oracle Database
The two best-known RDBMS (Relational Database Management Systems) with the largest market shares are Microsoft SQL Server and Oracle Database. They have a lot in common but also a lot of differences between them. Let's see in detail: Filegroups: They are… read more
How do we backup an Oracle Database that is in archive-log mode
In this article we will analyze what it takes to take an online backup of an Oracle database that is in archived-log mode. In order to take a backup in addition to the datafiles, we should also take a backup of the controlfile,... read more
What are set operators (Union) and how they differ from Joins in SQL
In this article we will analyze the use of set operators, the types that exist and the differences between them and SQL Joins. In the world of SQL (Structured Query Language) many times we will want to combine… read more
