Mysql input Chinese characters, rare characters report error "Incorrect string value"

1. Need to set the input text
format'set names "gb2312"';
or'set names "gbk"';
mysql_query(&mysql,"SET NAMES'GBK'");

if(nback=mysql_real_query(&mysql,p,(unsigned long)strlen(p)))
   {
        const char *pErr=mysql_error(&mysql);
        return false;
   }

 

2. Enter in the mysql input box

ALTER DATABASE database name DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;

3. Change all tables and column codes

First generate the change statement for all tables, so that all tables and columns in mysql can be encoded as utf8mb4 in batch

SELECT
    CONCAT(
        'ALTER TABLE ',
        TABLE_NAME,
        ' CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;'
    )
FROM
    information_schema.`TABLES`
WHERE
    TABLE_SCHEMA ='数据库名称';

4. Change the database configuration

The database configuration my.ini or my.cnf, your configuration may not be called this sentence.

Modified to the following configuration:

[client]

default-character-set=utf8mb4

 

[mysql]

default-character-set=utf8mb4

 

[mysqld]

collation-server = utf8mb4_general_ci

character-set-server = utf8mb4

 

Restart mysql after the change