The SQL EXISTS clause

The SQL EXISTS clause

Database by Doug

8 лет назад

62,786 Просмотров

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Baginda Mirza
Baginda Mirza - 21.06.2023 18:26

much thanks for your video! great explanation on this topic!

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Kevin
Kevin - 08.03.2023 22:54

Finally, someone answered the nagging question in my head, "Why not just use a join?" Thanks Doug!

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Veronica Brill
Veronica Brill - 04.02.2023 03:56

this was awesome

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Hadi
Hadi - 26.07.2022 10:37

Very nicely explained 👍TY

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Sean Angelu Asmolo
Sean Angelu Asmolo - 29.06.2022 20:34

exists are not for beginners xD

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Vulcan Starlight Music
Vulcan Starlight Music - 17.05.2022 09:03

Doug, you have helped me tremendously! When the part about NOT EXISTS was explained, this in itself shed light onto the exact problem I needed to mitigate. Thank you 🙂

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Vincenzo Corvaglia
Vincenzo Corvaglia - 24.04.2022 20:04

Very good explanation. Tank you so much!

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Christian Rodier
Christian Rodier - 12.02.2022 19:12

That is very helpful

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Ricky Chen
Ricky Chen - 03.11.2021 05:00

Thank you very much for such great content.

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Y S
Y S - 18.03.2021 08:15

love it

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Denys Kulpa
Denys Kulpa - 19.10.2020 11:56

you the MAN!

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Semi Kolon
Semi Kolon - 03.08.2020 06:51

Thank you Sir.

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MethodOverRide
MethodOverRide - 26.06.2020 22:01

Fantastic video and exactly what I needed!

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Hiep Trinh
Hiep Trinh - 31.05.2020 08:58

Thank you for making it understandable.

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Mike Shin
Mike Shin - 02.03.2020 02:07

Very clear!

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Mike Shin
Mike Shin - 01.01.2020 21:19

Good video!

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MI6
MI6 - 04.09.2019 02:17

May I ask you why Joins are more popular than the Exists clause? At least when I go to interviews or I speak to people they always ask me about Joins but never about the Exists clause

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EdTing Green
EdTing Green - 03.07.2019 19:16

Thx for the explanation. Do you mean exist will dedup and same with IN statement it will dedup too?

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Bruno Villela
Bruno Villela - 27.03.2019 17:28

Very good explanation! Thanks!

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Asp Anon
Asp Anon - 28.02.2019 13:57

Thanks a lot. What does the query return if WHERE EXISTS returns false?

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