Avatar of lcor
lcor
 asked on

SQL Union Different Tables

I came across some code and I'm trying to understand unions in SQL.

The code has two select statements between a union.  The two select statements are on the same table.

Isn't that a bad use of a union?  Shouldn't unions between different tables with like data?

Just trying to understand theory.  I can't post examples as they are proprietary.
SQL

Avatar of undefined
Last Comment
Sara bhai

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Ron Malmstead

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
SOLUTION
Sean Stuber

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
All of life is about relationships, and EE has made a viirtual community a real community. It lifts everyone's boat
William Peck