HJ

Leave HJ’s trace, All-In

[SQL First Step] 32. Table Joining

Table joining, INNER JOIN and LEFT JOIN

[Research Paper] Mastering the game of Go with deep neural networks and tree search

AlphaGo

[SQL First Step] 31. Set Operations

UNION

[SQL First Step] 30. Creating and Deleting View

View

[SQL First Step] 29. Index Creation and Deletion

Creating and deleting index