SQL, copy data from one table to another
New Course Coming Soon:
Get Really Good at Git
One of those maintenance tasks: copying data from one table to another.
You can copy all elements from a table into another like this:
INSERT INTO some_table
SELECT * FROM other_table
Of course you can just select some if you want:
INSERT INTO some_table
SELECT * FROM other_table WHERE list=94
If the table you’re copying to has existing data, you might have primary key duplication issues.
To leave the primary key column empty to make the table auto-fill it with its auto increment, I selected all columns except the primary key:
INSERT INTO some_table (`age`, `name`, `email`)
SELECT `age`, `name`, `email` FROM other_table
In my case id
was the primary key column, and I left it out.
Are you intimidated by Git? Can’t figure out merge vs
rebase? Are you afraid of screwing up something any time
you have to do something in Git? Do you rely on ChatGPT
or random people’s answer on StackOverflow to fix your
problems? Your coworkers are tired of explaining Git to
you all the time? Git is something we all need to use,
but few of us really master it. I created this course to
improve your Git (and GitHub) knowledge at a radical
level. A course that helps you feel less frustrated with
Git. Launching Summer 2024. Join the waiting list!
→ Read my
SQL Tutorial
on The Valley of Code
Here is how can I help you:
- COURSES where I teach everything I know
- THE VALLEY OF CODE your web development manual
- BOOTCAMP 2024 cohort in progress, next edition in 2025
- BOOKS 16 coding ebooks you can download for free on JS Python C PHP and lots more
- SOLO LAB everything I know about running a lifestyle business as a solopreneur
- Interesting links collection
- Follow me on X