autoinkrementáló

Autoinkrementáló is a term used in database management and programming to describe a column whose value is automatically generated and incremented for each new record. This feature is commonly used for primary keys, ensuring that each row in a table has a unique identifier. The specific behavior and syntax for autoinkrementáló columns vary depending on the database system being used. For instance, in SQL, the keywords AUTO_INCREMENT (MySQL), IDENTITY (SQL Server), or SERIAL (PostgreSQL) are used to define such columns. When a new record is inserted into a table with an autoinkrementáló column, the database system assigns the next available sequential number to that column, without requiring explicit user input. This simplifies data management and prevents potential errors related to duplicate or missing primary keys. The starting value and the increment step can often be configured, although the default is typically to start at 1 and increment by 1. This automatic generation mechanism is crucial for maintaining data integrity and facilitating efficient querying and relational operations within databases.