Informàtica. Programació. Desenvolupament web. Disseny gràfic. Xarxes.

Quizzes de desenvolupament web

UNIQUE and NOT NULL are contraints.

We use the DIFFERENT keyword to retrieve different values, for example: SELECT DIFFERENT column_name FROM table_name;

Indexes allow the database application to find data slowly.

A CREATE TABLE statement is a data definition language (DDL).

The first version of MySQL appeared on 23 May 1981.