8.5K
NAWatch till end to understand the difference between null, empty, zero values in SQL.
Also comment NULL for interview traps in this topic !
#job #database #corporate #interview #training
@nakulsharmma
#Null In Sql
Assista vídeos de Reels sobre Null In Sql de pessoas de todo o mundo.
Assista anonimamente sem fazer login.
Pesquisas Relacionadas
23Reels em Alta
(12)
1.9K
MASQL in 30 Day 7: NULL Values
#SQLin30 #dataanalyst #dataanalysis #dataanalytics #data #techjobs #analyst #breakintotech #sql #sqlcode #sqlcoding #coding #programming #wfh #workfromhome #wfhjobs #remotework #remotejobs
@marytheanalyst
4.2K
GOSQL -14 Series Concept Simplified: What is NULL?
In SQL, NULL doesn’t mean zero… doesn’t mean “no”… it simply means blank or unknown value.
EX: Think of it like this👇
A police officer asks a thief:
✔️ “Did you steal the laptop?”
Yes → Clear answer
No → Clear answer
(Silent… no answer) → This silence = NULL
NULL means:
🔸 No data
🔸 No response
🔸 Unknown value
🔸 Not equal to zero, not equal to empty text
👉 Whenever a field has nothing, SQL automatically stores NULL.
Follow us for Daily Tech Skills, SQL Concepts & Real-Time Examples!
Connect with Go Online Trainings
Fill this form to enquire about courses: https://forms.gle/9qAf2zPkR4pft8HN9
Call/WhatsApp: +91 90000 75637, +91 99199 19462
Email: goonline.bhaskar@gmail.com | info@goonlinetrainings.com | bhaskarjogi@gmail.com
Website: www.GoOnlineTrainings.com
#DatabaseManagement #SQLConcepts #MaterializedView #IndexedView #DataEngineering #DBA #TechEducation #LearnSQL #PerformanceOptimization #TechInsights #ProgrammingBasics #ITKnowledge
@goonlinetrainings
6.8K
DADay 23 SQL 🔥| NULL Confusion Ends Here
SAVE this and SHARE with your Data Analyst batch!
📺 Follow on YouTube: Link in Bio
👉 www.youtube.com/@DataXOdyssey
❌ Wrong way (returns no rows)
SELECT * FROM employees
WHERE Country = NULL;
✅ Correct way to check missing country
SELECT * FROM employees
WHERE Country IS NULL;
🎯 Interview Question:
Find employees whose salary is missing but country has already been assigned
SELECT * FROM employees
WHERE Salary IS NULL
AND Country IS NOT NULL;
Key concept every SQL learner must know 👇
NULL ≠ 0
NULL ≠ blank
NULL means missing / unknown value
This single concept avoids 90% beginner SQL mistakes.
📌 How do NULL values get into a table?
• When a value is not entered while adding a record
• When a column is skipped during data insertion
• When an existing value is removed later
• When the information is unknown or not available yet
👉 In SQL, missing or unknown data is stored as NULL
🔁 Save this
❤️ Like for more
📌 Follow for daily SQL learning
🔁 DAY SERIES FLOW
👉 Check Out Day 22: DISTINCT vs COUNT(DISTINCT) 💡
#Day23SQL #SQLHacks #Null#IsNull #Is Not Null #SQLFunctions #SQLTutorial
#ExplorePage #DataAnalytics #SQLInterview #LearnSQL
#MySQL #PostgreSQL #DataAnalyst #TechJobsIndia
#DataXOdyssey #ReelItFeelIt #SQLBeginners
#Coding #Programming #DataScience#DataEngineer #Reels
@dataxodyssey
413.1K
EMComment “SQL” to get links!
🚀 Want to master SQL without getting bored to tears? This mini roadmap takes you from “what is a database?” to solving complex crimes with code.
🎨 DrawSQL
Stop trying to visualize complex databases in your head. This tool lets you build beautiful Entity Relationship Diagrams (ERDs) just by dragging and dropping. It is the best way to understand how tables relate to each other—Foreign Keys and Joins finally make sense when you can actually see them.
⚡ SQLBolt
Perfect if you want to learn by doing, not reading. This site gives you bite-sized, interactive lessons right in your browser. No installation needed. You’ll race through the basics of SELECT, filtering, and aggregations with instant feedback on your code.
🕵️ SQL Murder Mystery
The ultimate way to practice. There has been a murder in SQL City, and you have to solve it by querying the police database. You will use advanced logic, joins, and wildcards to find the killer. It turns “studying” into a detective game you actually want to play.
💡 With these resources you will:
Visualize database architecture like a System Designer
Master the syntax through hands-on repetition
Build real-world problem-solving skills (and have fun doing it)
If you are aiming for Data Analytics or Backend Engineering roles, these 3 tools are your cheat sheet.
📌 Save this post so you don’t lose the roadmap.
💬 Comment “SQL” and I’ll send you the direct links. 👉 Follow for more content on Coding, Data, and Tech Careers.
@emrcodes
87.5K
AF📘 SQL Day 32 – Handling NULL Properly (Most Ignored Concept)
“NULL is not ZERO. Not EMPTY. Not FALSE.” ⚠️
Content:
• = NULL ❌ (Wrong)
• Use IS NULL ✅
• COUNT(column) ignores NULL
• COUNT(*) counts all rows
• Use COALESCE() to replace NULL
Example:
SELECT COALESCE(bonus, 0)
FROM employees;
Interview Tip:
Many wrong answers happen because of NULL confusion.
Save this — it will save your interview 💯
@afterhours_rahmat
12.3K
FRNull in JavaScript: Primitive or Object? 🤔🔎
Learn more in our "JavaScript: From First Steps to Professional" course
#JavaScript #WebDev #Programming #Coding #LearnToCode
@frontendmasters
135
DAUnderstanding NULL in SQL
NULL is trickier than it looks in SQL!
Don’t let it break your queries
#SQLTricks #NullValues #DataScience #SQLMastery
@datagoacademy
4.8K
COThis is a simple but tricky SQL interview question.
Why does COUNT(column) ignore NULL values?
1️⃣ NULL means “unknown”
In SQL, NULL is not a value.
It represents missing or unknown data.
⸻
2️⃣ COUNT(column) counts actual values
COUNT(column) only counts rows
where the column has a real (non-NULL) value.
Example:
SELECT COUNT(email) FROM users;
If 3 emails are NULL → they are not counted.
3️⃣ Difference from COUNT(*)
•COUNT(*) → counts all rows
•COUNT(column) → counts only non-NULL values
4️⃣ Why this behavior exists
Aggregations in SQL usually ignore NULLs
to avoid incorrect calculations.
🎯 Interview takeaway
COUNT(column) = count of known values only
NULL is ignored because it’s not a real value.
{ SQL, Databases, BackendDeveloper, SoftwareDevelopment, Programming, DatabaseConcepts, SystemDesign, ComputerScience, TechCareers, InterviewPrep }
#SQL
#Databases
#BackendEngineering
#SystemDesign
#TechExplained
@codemeetstech
656.2K
NIЧто такое SQL инъекция? #sqlinjection #sql #hacking #hacker #hack #web #website #it #programming #vulnerability #cybersecurity #айти
@nikidev1
1.1M
CSSQL only has like 10 cmds
@cs.aar0n
7.2K
EXSQL Class Day #14 In Telugu | Not Null
Please Follow Us For More Content
This Short is About SQL Class Not Null in Integrity Constraints Day #14 (SQL series) in Telugu for SQL Developers, Data Analyst and Business Analyst. By Srinivas Reddy Excel Telugu Videos
—NOT NULL:
—This Constraint will Not accept null values.
CREATE TABLE EMP1(
EID INT NOT NULL,
ENAME VARCHAR(20),
ESAL INT
)
go
INSERT INTO EMP1 VALUES(101,’SRINIVAS’,22000)
go
INSERT INTO EMP1 (ENAME,ESAL)
VALUES(‘SRIDHAR’,25000)
go
INSERT INTO EMP1 (EID,ESAL) VALUES(103,35000)
go
SP_HELP EMP1
#sqltelugu #excel #shorts #telugu #excelteluguvideos #mysql #sqltelugu #trending #reels #memes #office
@excelteluguvideos
✨ Guia de Descoberta #Null In Sql
O Instagram hospeda thousands of postagens sob #Null In Sql, criando um dos ecossistemas visuais mais vibrantes da plataforma.
Descubra o conteúdo mais recente de #Null In Sql sem fazer login. Os reels mais impressionantes sob esta tag, especialmente de @cs.aar0n, @nikidev1 and @emrcodes, estão ganhando atenção massiva.
O que está em alta em #Null In Sql? Os vídeos Reels mais assistidos e o conteúdo viral estão destacados acima.
Categorias Populares
📹 Tendências de Vídeo: Descubra os últimos Reels e vídeos virais
📈 Estratégia de Hashtag: Explore opções de hashtag em alta para seu conteúdo
🌟 Criadores em Destaque: @cs.aar0n, @nikidev1, @emrcodes e outros lideram a comunidade
Perguntas Frequentes Sobre #Null In Sql
Com o Pictame, você pode navegar por todos os reels e vídeos de #Null In Sql sem fazer login no Instagram. Sua atividade permanece completamente privada - sem rastros, sem conta necessária. Basta pesquisar a hashtag e começar a explorar conteúdo trending instantaneamente.
Análise de Desempenho
Análise de 12 reels
💡 Posts top têm média de 572.9K visualizações (2.9x acima da média)
Foque em horários de pico (11-13h, 19-21h) e formatos trending
Dicas de Criação de Conteúdo e Estratégia
💡 O conteúdo de melhor desempenho recebe mais de 10K visualizações - foque nos primeiros 3 segundos
📹 Vídeos verticais de alta qualidade (9:16) funcionam melhor para #Null In Sql - use boa iluminação e áudio claro
✍️ Legendas detalhadas com história funcionam bem - comprimento médio 566 caracteres
✨ Alguns criadores verificados estão ativos (17%) - estude o estilo de conteúdo deles
Pesquisas Populares Relacionadas a #Null In Sql
🎬Para Amantes de Vídeo
Null In Sql ReelsAssistir Null In Sql Vídeos
📈Para Buscadores de Estratégia
Null In Sql Hashtags em AltaMelhores Null In Sql Hashtags
🌟Explorar Mais
Explorar Null In Sql#null#null in sql explained#sql#null value in sql databases#nulle#nulls#null in javascript vs sql#Null in SQL Database