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Web development quizzes

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Indexes allow the database application to find data slowly.

This query is correct: SELECT column1 FROM table1 UNION SELECT column2 FROM table2;

A BLOB stands for Binary Large Object.

MySQL is (as of March 2014) the world's second most widely used open-source RDBMS.

This query is correct: SELECT * FROM employee WHERE age IN (20,21,22);