#1273 – Unknown collation: ‘utf8mb4_unicode_520_ci’

Question

I have a WordPress website on my local WAMP server. But when I upload its database to live server, I get error

#1273 – Unknown collation: ‘         


        

Answer 1

In my case I substitute it with utf8_general_ci with sed like this:

sed -i 's/utf8_0900_ai_ci/utf8_general_ci/g' MY_DB.sql 
sed -i 's/utf8mb4_unicode_520_ci/utf8_general_ci/g' MY_DB.sql 

After that, I can import it without any issue.

Answer 2

I solved it this way, I opened the .sql file in a Notepad and clicked CTRL + H to find and replace the string "utf8mb4_0900_ai_ci" and replaced it with "utf8mb4_general_ci".

Answer 3

I believe this error is caused because the local server and live server are running different versions of MySQL. To solve this:

1. Open the sql file in your text editor
2. Find and replace all utf8mb4_unicode_520_ci with utf8mb4_unicode_ci
3. Save and upload to a fresh mySql db

Hope that helps

Answer 4

Open the sql file in your text editor;

1. Search: utf8mb4_unicode_ci Replace: utf8_general_ci (Replace All)

2. Search: utf8mb4_unicode_520_ci Replace: utf8_general_ci (Replace All)

3. Search: utf8mb4 Replace: utf8 (Replace All)

Save and upload!

Answer 5

You can solve this by finding

ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;

in your .sql file, and swapping it with

ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_general_ci;

Answer 6

find and replace:

utf8mb4_unicode_520_ci

with

utf8_general_ci

in whole sql file