Ask your bosses for help. Why have you changed the database settings and still do not support emoj emoticons?

I have changed the database configuration file and changed the database table and field code to utf8-mb4, and restarted the database. Why do you still not support emoj emoticons? Using the ssm development framework, the error Incorrect string value: "xF0x9Fx8Cx9F" for column" username" at row 1 is still reported when writing to the database

Java mysql spring

Aug.31,2021

The mysql connection string in

JDBC should also be configured with the character set. Refer to Portal

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Mysql insert data primary key duplicate problem
now insert data into a table in mysql, and the primary key will be duplicated. The data sent will have a timestamp. When the data is repeated, the nearest one needs to be stored according to the timestamp. At a later stage, there will be millions of pie...

Java mysql spring

Aug.28,2021

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b37f3b-2c0db.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b37f3b-2c0db.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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