UrbanPro

Learn SQL Programming from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

What is the difference between null and not null in SQL server?

Asked by Last Modified  

Follow 3
Answer

Please enter your answer

Trainer

null means there may or may not be data while not null means data must be present.
Comments

It Professional Trainer With 20 Years of Experience in in Key Aspects of Software Development

If 'not null' is used it means that a column cannot have null values. If 'null' is used is used it means that a column can have null values.
Comments

Related Questions

I need your help to choose my career as I have three years of gap between my education. I know SQL. Can anyone tell me should I choose MS SQL server or oracle because I am interested in the database? Which one will be better to learn to get into the IT industry? Please help me! Thank you!
As you are strong and interested in SQL, why not to choose ETL Testing? It has a good career ahead in data projects. To survive in the market, you need both Oracle & SQL Server. Actually, both are almost same but are different products.
Santhosh
I want to teach, how can I?
You can teach students Online as well as offline. If you want to teach online you need to have a communicating media.
Yasheela
How do I become master in SQL server? I am looking for real time case studies to write queries, stored procedures etc.
Hi Komal, Try to command basic SQL statement first. Understand the very basic concepts of DDL , DML and TCL commands.. start with writing SELECT statement with WHERE clause , using aggregate functions...
Komal
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons


SQL
Structured query language-It is a language to interact with the database. Database-It is a collection of data's in the form of tables. Tables-Collection of rows and columns Rows are also called as tuples...

Primary Key VS Unique Key In Database.
PRIMARY KEY UNIQUE KEY Primary key is a set of one or more fields/columns of a table that uniquely identify a record in database table. Primary keys must contain unique values. Unique-key...

PLSQL- PROGRAM TO FIND THE GIVEN CHARACTER HOW MANY TIMES REPEATED
declare str varchar2(80):='&str'; ab char:='&ch'; i number; l number; c number; begin l:=length(str); for i in 1..l loop if (substr(str,i,1=ab)...

Looping In Oracle SQL Using Level
We will see about the syntax LEVEL in Oracle sql. If we want to loop through and print a set of values in SQL, LEVEL could come handy. Example query: SELECT 'hi', LEVEL FROM DUALCONNECT BY LEVEL <=...

Recommended Articles

Microsoft Excel is an electronic spreadsheet tool which is commonly used for financial and statistical data processing. It has been developed by Microsoft and forms a major component of the widely used Microsoft Office. From individual users to the top IT companies, Excel is used worldwide. Excel is one of the most important...

Read full article >

Hadoop is a framework which has been developed for organizing and analysing big chunks of data for a business. Suppose you have a file larger than your system’s storage capacity and you can’t store it. Hadoop helps in storing bigger files than what could be stored on one particular server. You can therefore store very,...

Read full article >

Software Development has been one of the most popular career trends since years. The reason behind this is the fact that software are being used almost everywhere today.  In all of our lives, from the morning’s alarm clock to the coffee maker, car, mobile phone, computer, ATM and in almost everything we use in our daily...

Read full article >

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

Read full article >

Looking for SQL Programming Training?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for SQL Programming Classes?

The best tutors for SQL Programming Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn SQL Programming with the Best Tutors

The best Tutors for SQL Programming Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more