A collection of SQL interview questions

• 13. Customers who never order
• 15. Second highest salary
• 21. Actors who cooperated with Directors atleast three times
• 52. Consecutive numbers
• 61. Captial gain
• 66. Apple&Organge
• 72. Customers who bought a, b but not c
• 75. Managers with atleast 5 direct reports
• 87. Count student number in departments
• 95. User daily counts

SQL tutorials and cheatsheets

• W3school
• SQL cheatsheet by Amidi brothers