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Walid Djebali

Just sharing my knowledge

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    • dbt
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Apache Spark / Data Posted on: 25/09/202414/10/2024

In apache spark the executors accept jobs from the driver or tasks from the driver ?

In Apache Spark, executors accept and execute tasks from the driver. Here’s a breakdown of […]

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Apache Spark / Data Posted on: 24/09/202414/10/2024

Apache spark glossary

Slot CPU Core, it is often associated with a CPU core. Each physical core of […]

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Redshift LOCK
Data / Database / SQL Posted on: 04/07/202404/07/2024

Redshift LOCK

Overview There are three LOCK mode: AccessExclusiveLock: Acquired primarily during DDL operations, such as ALTER TABLE, DROP, or TRUNCATE. […]

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Data / Database Posted on: 15/06/2024

Comprendre les Bases de Données Columnar

Une base de données columnar (ou colonne, en français) est une architecture de stockage de […]

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Data / SQL Posted on: 10/06/2024

Comprendre le Pivotement en SQL avec le mot clé PIVOT

Le pivotement en SQL est une technique puissante pour transformer les données de lignes en […]

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