GATE CSEIT/Database Relational algebra part 1 ( Selection and projection operator). Lui Kreyszig 4 weeks ago GATE CSEIT/Database Relational algebra part 1 ( Selection and projection operator). https://www.gyanodhan.com/video/7B6.%20GATE%20CSEIT/Database/650.%20Relational%20algebra%20part%201%20%28%20Selection%20and%20projection%20operator%29.mp4