Refer the links below for search and join operations

1. https://www.youtube.com/watch?v=xCRGMwIlmtY

2. https://www.youtube.com/watch?v=wDPSQ0hDjEg

3. https://www.youtube.com/watch?v=rT4eI3p3tVk

4. https://www.youtube.com/watch?v=Z2mcye8SM9Y

5. https://www.youtube.com/watch?v=x0HF_uQv96k