Rename Symmetric Pairs.sql to Symmetric Pairs.sql

Rename Project_Planning.sql to Project_Planning.sql

Rename Interviews.sql to Interviews.sql

Rename Higher Salary Than Friends.sql to Higher Salary Than Friends.sql

Rename README.md to README.md

Create Interviews.sql

Create Symmetric Pairs.sql

Create Higher Salary Than Friends.sql

Create Project_Planning.sql

Rename Adavamce_Join to Adavamce_Joins/README.md

Create Adavamce_Join

Create Binary_tree_node.sql

Create Contest Leaderboard.sql

Create Challenges.sql

Create Ollivander's Inventory.sql