Description: The Employee table holds all employees. Every employee has ...

Suppose that a website contains two tables, the Customers table and the ...

Description: Write a SQL query to find all duplicate emails in a table n...

Description: Write a SQL query to find all numbers that appear at least ...

Description: Write a SQL query to get the nth highest salary from the Em...

Description: Write a SQL query to get the second highest salary from the...

Description: All DNA is composed of a series of nucleotides abbreviated ...

Description: Given an input character array, reverse the array word by w...

Description: Given a list of non negative integers, arrange them such th...