What are the differences between SQL, MySQL, and SQL Server?

What is the difference between SQL and PL/SQL?

Is it possible to sort a column using a column alias?

What is the SQL query to display the current date?

Which are joins in SQL? Name the most commonly used SQL joins?

What are the different types of joins in SQL?

What is INNER JOIN in SQL?

What is the Right JOIN in SQL?

What is Full Join in SQL?

What is a "TRIGGER" in SQL?

What is self-join and what is the requirement of self-join?