1055. Mysql8.0 high version data import 5.6 low version general solution

background

Today, I want to export the database files in mysql (8.0) of this machine to mysql (5.6) in a remote server. At the beginning, I used source to report a series of ERRORs. Since the amount of data is relatively large, I directly use graphical tools to import Well, connect to the remote database, build the library, and then run the SQL file, it is still unsuccessful, as follows:

[SQL] Query sql_bs start
[ERR] 1273 - Unknown collation: 'utf8mb4_0900_ai_ci'
[ERR] /*
 Navicat Premium Data Transfer

Find the place where the error was reported at the beginning. When I saw this problem, I saw that it was an encoding problem. After modifying the encoding, the data was imported perfectly.

---

question

This error is that there is no "utf8mb4_0900_ai_ci" encoding, because the mysql version I use is: 5.6, and this version of mysql does not have this encoding method.

If you don't know your mysql version, you can check it on Baidu: How to query mysql version

Here is a way, in Navicat software –> New Query –> Inputselect version();

You can get your own mysql version.

---

solve

The first

Upgrade mysql version to 8.0

However, in general, it is because of special reasons that the version cannot be changed, so there is a second method:

the second

Modify the encoding method

        Open the sql file, replace all utf8mb4_0900_ai_ci in the file with utf8_general_ci, and replace utf8mb4 with utf8 at the same time . After processing the sql, re-import the sql file in the mysql library.

---

result