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
شاهد فيديو ريلز عن Null In Sql من أشخاص حول العالم.
شاهد بشكل مجهول دون تسجيل الدخول.
عمليات بحث ذات صلة
23ريلز رائجة
(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
✨ دليل اكتشاف #Null In Sql
يستضيف انستقرام thousands of منشور تحت #Null In Sql، مما يخلق واحدة من أكثر النظم البصرية حيوية على المنصة.
مجموعة #Null In Sql الضخمة على انستقرام تضم أكثر الفيديوهات تفاعلاً اليوم. محتوى @cs.aar0n, @nikidev1 and @emrcodes وغيرهم من المبدعين وصل إلى thousands of منشور عالمياً. فلتر وشاهد أحدث ريلز #Null In Sql فوراً.
ما هو الترند في #Null In Sql؟ أكثر مقاطع فيديو Reels مشاهدة والمحتوى الفيروسي معروضة أعلاه.
الفئات الشعبية
📹 اتجاهات الفيديو: اكتشف أحدث Reels والفيديوهات الفيروسية
📈 استراتيجية الهاشتاق: استكشف خيارات الهاشتاق الرائجة لمحتواك
🌟 صناع المحتوى المميزون: @cs.aar0n, @nikidev1, @emrcodes وآخرون يقودون المجتمع
الأسئلة الشائعة حول #Null In Sql
مع Pictame، يمكنك تصفح جميع ريلز وفيديوهات #Null In Sql دون تسجيل الدخول إلى انستقرام. نشاط المشاهدة الخاص بك يبقى خاصاً تماماً - لا آثار، لا حساب مطلوب. ببساطة ابحث عن الهاشتاق وابدأ استكشاف المحتوى الرائج فوراً.
تحليل الأداء
تحليل 12 ريلز
💡 المنشورات الأفضل تحصل على متوسط 573.0K مشاهدة (2.9× فوق المتوسط)
ركز على أوقات الذروة (11-13، 19-21) والصيغ الرائجة
نصائح إنشاء المحتوى والاستراتيجية
🔥 #Null In Sql يظهر إمكانات تفاعل عالية - انشر بشكل استراتيجي في أوقات الذروة
✨ بعض المبدعين الموثقين نشطون (17%) - ادرس أسلوب محتواهم
✍️ التعليقات التفصيلية مع القصة تعمل بشكل جيد - متوسط الطول 566 حرف
📹 مقاطع الفيديو العمودية عالية الجودة (9:16) تعمل بشكل أفضل لـ #Null In Sql - استخدم إضاءة جيدة وصوت واضح
عمليات البحث الشائعة المتعلقة بـ #Null In Sql
🎬لمحبي الفيديو
Null In Sql Reelsمشاهدة فيديوهات Null In Sql
📈للباحثين عن الاستراتيجية
Null In Sql هاشتاقات رائجةأفضل Null In Sql هاشتاقات
🌟استكشف المزيد
استكشف Null In Sql#null#null in sql explained#sql#nulle#nulls#null in javascript vs sql#Null in SQL Database#null data in sql