Différence entre le système Opérationnel et décisionnel
Les systèmes opérationnels encore appelés le système OLTP sont faits pour assister les taches quotidiennes, répétitives et atomique(c’est à dire l’insertion, modification et suppression) au sein d’une entreprise.
La tendance tourne vers l’utilisation de P.G.I. (progiciels de gestion intégrée) qui permettent de regrouper tous les logiciels de gestion d’une l’entreprise. Le PGI regroupe les logiciels de finances, ressources humaines, logistique, ventes en un seul système d’information ou progiciel organisé dans une seule base de données. L’adoption d’un PGI permet de réduire les coûts de communications entre les applications, l’ntégrité et l’unicité du Système d’information.
Pourquoi les systèmes décisionnel?
Les données deviennent de plus en plus énormes et que les bases de données classiques n’arrivent plus à fournir des informations sûres aux décideurs pour faciliter la prise de décision.
C’est quoi alors un système décisionnel?
Les systèmes décisionnels encore appelés OLAP sont dédiés à la gestion d’une entreprise afin d’aider les décideurs pour la prise de décision.
La tendance actuelle des systèmes décisionnels est la mise en place d’un entrepôt de données.
Bien que les systèmes OLTP et OLAP ont pour but de regrouper les données d’une entreprise dans un SGBD et de permettre l’accès aux utilisateurs, ils présentent vraiment une différence au niveau du contenu.
C’est quoi la différence entre un système opérationnel et décisionnel?
Dans un système OLTP, les données sont conservées sur une courte durée, elles sont plus détaillées.
Dans un système OLAP, les données sont historisées et souvent agrégées.
Dans un système OLTP les requêtes sont simple et répétitives alors que dans un système OLAP elles sont complexes et variées.
Le nombre d’utilisateur est énorme au niveau des systèmes OLTP alors que celui des systèmes OLAP est réduit puisqu’il s’agit seulement des décideurs de l’entreprise.
Ce que tu penses tu le deviens, ce que tu ressens tu l’attires, ce que tu imagines tu le crées
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