Solve the problem that MySQL inserts Chinese garbled code into the table

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Preface

Use... On the command line MySQL Chinese garbled code when adding data to the table after creating the table , I installed MySQL The version is MySQL 5.7, stay MySQL 8.0 This problem will not occur after version , So it's based on MySQL 5.7 In terms of version

mysql> insert into student values(1002,' Zhang San ');
ERROR 1366 (HY000): Incorrect string value: '\xD5\xC5\xC8\xFD' for column 'name' at row 1

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One 、 Why does this happen ERROR

This is from MySQL The default character set in is Latin1 Caused by , When we use Chinese to add to the table, there will be Chinese garbled , To report a mistake , produce ERROR

Two 、 Solution steps

1： Check the code command

Use the following command on the command line

show variables like 'character_%';
show variables like 'collation_%';

2. modify MySQL Under the data directory of my.ini The configuration file

Modify the configuration file using the advanced text editor , What I use here is Sublime Text 3, After opening and modifying with software such as Notepad, the file code may be changed to “ contain BOM head ” The coding , Thus, the service restart fails .

default-character-set=utf8 # Default character set 
[mysqld] #  In about 76 Row or so , Add under 
...
character-set-server=utf8
collation-server=utf8_general_ci

3. restart MySQL service

Here you can manually shut down or use the command line to restart MySQL service , The following figure shows restart using the command line MySQL service

4. Review the encoding command again

Continue to use the following commands on the command line

show variables like 'character_%';
show variables like 'collation_%';

5. Add Chinese data to the table again

Be careful

Pay attention here , Note that the character set of the previously created table is Latin1, So when adding Chinese, I will report ERROR, The solution here is to delete the database directly , Recreate Library , The default is utf8 La

Recreate the database

Add Chinese data to the table after re creating the table

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summary

So that's the solution MySQL Add data to the table and insert Chinese garbled code , Targeted only MySQL 5.7 edition ,MySQL 8.0 The default character set of the version is utf8, You can insert Chinese data directly into the table . The principle is also the default way to modify the character set ,utf8 Character set .
If you forget to change the default code , There will be a problem of garbled code . from MySQL 8.0 Start , The default code of the database is changed to utf8mb4 , Thus, the above garbled code problem is avoided .