Articles du professeur : ESSADDOUKI Mostafa

Software that manages the hardware of a computer is known as an operating system. Additionally, it serves as an intermediary between the user and the computer hardware, providing a... Lire la suite

Constraints allow you to limit the type of data to insert into a table. These constraints can be specified when creating the table using the CREATE TABLE statement, or after creating... Lire la suite

Data types represent a kind of data that can be stored in the database. The data type is the set of representable values. It is also known as an attribute that specifies a data type... Lire la suite

An operator is a reserved word or character used primarily in the WHERE clause of an SQL statement to perform operations, such as comparisons and arithmetic operations. These operators... Lire la suite

A table is a set of data relating to the same entity. It is structured in the form of a table. A table can also be called a relation (it contains the data which are in relation to... Lire la suite

A coherent computer system of information likely to be used simultaneously by several people. In fact, a database is a collection of files shared by several users. It is therefore... Lire la suite

SQL is a language for operating databases; it includes creating, deleting, extracting lines, modifying lines, etc. databases. SQL is an American National Standards Institute (ANSI)... Lire la suite

Dans un système avec un seul cœur de processeur, un seul processus peut s'exécuter à la fois. D'autres doivent attendre que le cœur du processeur soit libre et puisse être reprogrammé.... Lire la suite

Plusieurs processus existent simultanément dans le système. Tous les processus ont des besoins différents. Certains peuvent avoir besoin de l'unité centrale pour l'exécution, tandis... Lire la suite

Le noyau alloue des ressources à un processus et le planifie pour l'utilisation du CPU. En conséquence, la vue du noyau d'un processus se compose de deux parties : Code, données et... Lire la suite