Development with PHP and Java. Graphic design with GIMP and Inkscape.

Web development quizzes

There are different versions of the SQL language.

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

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

A primary key column can contain NULL values.

This query retrieves the employees whose names end with h: SELECT * FROM employees WHERE name LIKE 'h%';