What is NULL, NVL, NVL2, Coalesce in SQL? Why it is important to handle NULL?

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What is NULL, NVL, NVL2, Coalesce in SQL? Why it is important to handle NULL?

#sql

#etltesting
  1. Tester Hoon
  2. nvl
  3. nvl2
  4. coalesce
  5. null
  6. what
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Комментарии
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Contents of this channel are ready awesome. The way of explanation really cool. I love to watch all the vides of this channel as ETL tester.

SANJAYYADAV-hmbs
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Thanks a lot. I am a new learner for ETL Testing. For interview preparation using your shared experience, knowledge. Thank you again.

smiley
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Please upload the videos in English ...your content and explanation is good...

RakeshKumar-qloi
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Please explain in English it's very useful

vasugin
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mam by default null is considered as highest value or lowest value in the database.

gullasridhar
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Good morning mam
as etl tester which AWS services we should know for performing task.

dattabandi
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My when hiring will start after March??

Manifest_kannada
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can Coalesce and NVL2 both are performing same work ?

My-Research