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QUIZ GAME: Database

            Written: Maryna Pylnyk, 18/03/2017     

Did you know that before MySQL 5.7.7, subqueries cannot be used in the FROM clause of a view

Mysql. Is this query valid?

SELECT id, COUNT(*) AS cnt FROM table1 WHERE cnt > 0 GROUP BY id;

MySQL : Which one of the following operations is not correct:

MySQL : Which of these storage engine doesn't support TEMPORARY tables?

Mysql. Is there limit of number of tables?

Mysql. NULL is the same thing as an empty string ''?


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Tools (
Gioco: allenamento con la tastiera Strumenti di codifica/decodifica URI (%-encoding) e Base64 Strumenti di calcolo online per IP e Reti
Quiz game