My answers of sql_zoo(https://sqlzoo.net/wiki/SQL_Tutorial).
Some problems are so basic that the answers are not listed.
Any other ideas or solutions are welcome.:hatched_chick:
My answers of sql_zoo(https://sqlzoo.net/wiki/SQL_Tutorial).
Some problems are so basic that the answers are not listed.
Any other ideas or solutions are welcome.:hatched_chick: