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

Quizzes de desenvolupament web

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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.