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

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

SQL (Structured Query Language)

SQL (Structured Query Language) is a standardized programming language used for managing relational databases and performing various operations on the data in them. Initially created in the 1970s, SQL...

ITech Analytic Solutions

0 0

Cursors In SQL Server

First thing first Usage of Cursors is not encouraged in SQL Server as they are slow. You may go with While loop if you need to iterate through a recordset. Cursor is a database object to retrieve data...

Redbush Technologies Pvt.Ltd.

0 0

SQL UPDATE SUBQUERY

Suprio Dutta

0 0

Working with Different Versions of VBA

Office 2010 introduces a new version of Microsoft Visual Basic for Applications (VBA) known as VBA 7.0 that is updated to work with 64-bit client installations. VBA 7.0 improves the performance of your...

Punit Kumar

1 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

I want to teach, how can I?

17 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

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

20 Answers

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

5 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.