Tietokantamerkinnät

Tietokantamerkinnät, also known as database records, are the fundamental units of information stored within a database. Each tietokantamerkintä represents a single, structured entry, typically corresponding to a row in a table. These entries are composed of individual data fields, which hold specific pieces of information about the entity the record describes. For example, in a database table of customers, a single tietokantamerkintä might contain fields for the customer's name, address, phone number, and email.

The structure of a tietokantamerkintä is defined by the schema of the database table it belongs to. This schema dictates the types of data that can be stored in each field (e.g., text, numbers, dates) and any constraints or rules that apply. When data is entered or modified in a database, it is done at the tietokantamerkintä level. Databases provide various operations to create, read, update, and delete these records, often referred to by the acronym CRUD. The efficient management and retrieval of these individual entries are crucial for the performance and functionality of any database system. Each tietokantamerkintä is typically assigned a unique identifier, known as a primary key, which ensures that it can be distinguished from all other records within the same table.