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

Quizzes de desenvolupament web

This statement adds a column: ALTER TABLE employee DROP COLUMN age.

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

Querying directly from a table takes more time than querying from a view.

This query returns all the columns from the table Employee: SELECT + FROM Employee

A DROP statement is a data definition language (DDL).