true

Learn SQL Programming from the Best Tutors

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

Search in

SQL Union Vs Union ALL

Umasankar Natarajan

06/06/2017 0 0

SQL UNION vs UNION ALL Operator Usage

UNION:

UNION combines the result set of two or more queries into a single result set. UNION removes duplicate records (where all columns in the results are the same).

UNION ALL:

UNION combines the result set of two or more queries into a single result set. UNION ALL does not remove duplicate records.

Important points:

The following points need to be considered when using the UNION or UNION ALL operator:

The number of columns and sequence of columns must be the same in all queries
The data types must be compatible.

0 Like 0 Dislike

Follow 0

Other Lessons for You

How To Minimize The Page Splits In Sqlserver To Improve The Performane Of Database?

How to minimize the page splits in sqlserver to improve the performane of database? Page Splits: A page is 8Kbytes of data which can be index related, data related, large object binary (lob’s)...

Amitava Majumder

1 0

Hiding .php extension Using HTACESS File

If you wish to hide.php extension from your website, then create a .htaccess file in your project root and paste the following code : RewriteEngine On RewriteCond %{THE_REQUEST} ^{3,}\s/(.+)\.php*...

Amit S.

0 0

Top 10 SQL Concepts for Job Interview

1. SELECT and FROM: This is the “heart” of any SQL query - SELECT columns FROM table.2. WHERE: This acts as a filter and allows you to select only relevant rows based on conditions.3. GROUP...

Kavaiya Yashumar Amrutlal

0 0

AUTO INCREMENT PRIMARY KEY

Suprio Dutta

0 0

An Introduction to Business Intelligence Concepts

Looking for a Business Intelligence (BI) solution for your company can be intimidating. BI uses its own special terminology and the database design concepts can be difficult to grasp. So where do you...

ITech Analytic Solutions

0 0

Find SQL Programming Training near you

Online SQL Training

Looking for SQL Programming Training?

Learn from Best Tutors on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you

SQL Programming Questions

How do I become master in SQL server? I am looking for real time case studies to write queries, stored procedures etc.

5 Answers

Which is a good reference book to learn SQL and database from basics?

20 Answers

I need your help to choose my career as I have three years of gap between my education. I know SQL. Can...

28 Answers

I want to teach, how can I?

17 Answers

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

I am a Student I am a Tutor
Name*	Please enter your full name. Please enter institute name.
Email*	Please enter your email address.
Phone*	Please enter a valid phone number.
Location*	Please enter a pincode or area name.
City*	Please enter city name.
Category*	Please enter category.
Gender*	Male Female Please select your gender.
Email ID/ Mobile No.*	Please enter either mobile no. or email.
Enter Password*	Please enter OTP Please enter Password Sorry, this phone number is not verified, Please login with your email Id.