![Moodle in English: Error reading from database - COLLATION 'utf8mb4_bin' is not valid for CHARACTER SET 'utf8' SELECT * FROM mdl_user WHERE LOWER(username) COLLATE utf8mb4_bin .. Moodle in English: Error reading from database - COLLATION 'utf8mb4_bin' is not valid for CHARACTER SET 'utf8' SELECT * FROM mdl_user WHERE LOWER(username) COLLATE utf8mb4_bin ..](https://moodle.org/pluginfile.php/143/mod_forum/post/1611604/image2.jpg)
Moodle in English: Error reading from database - COLLATION 'utf8mb4_bin' is not valid for CHARACTER SET 'utf8' SELECT * FROM mdl_user WHERE LOWER(username) COLLATE utf8mb4_bin ..
![COLLATION 'utf8_bin' is not valid for CHARACTER SET 'utf8mb4' · Issue #481 · speedment/speedment · GitHub COLLATION 'utf8_bin' is not valid for CHARACTER SET 'utf8mb4' · Issue #481 · speedment/speedment · GitHub](https://user-images.githubusercontent.com/10995950/26944811-174bdf1c-4c8a-11e7-8047-e2ae47de2cc8.png)
COLLATION 'utf8_bin' is not valid for CHARACTER SET 'utf8mb4' · Issue #481 · speedment/speedment · GitHub
![mariadb - MySQL What charset/collation for Case insensitivity and Accent sensitivity? - Database Administrators Stack Exchange mariadb - MySQL What charset/collation for Case insensitivity and Accent sensitivity? - Database Administrators Stack Exchange](https://i.stack.imgur.com/OBoON.png)
mariadb - MySQL What charset/collation for Case insensitivity and Accent sensitivity? - Database Administrators Stack Exchange
![MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji. MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji.](https://uploads-ssl.webflow.com/623bc20a8d5c4a1ea516549f/62426b32162e554c0f7c8d9a_utt8mb4.png)
MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji.
![MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji. MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji.](https://uploads-ssl.webflow.com/623bc20a8d5c4a1ea516549f/6242699bb21bef00fb875b54_mysqld.png)
MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji.
Migrate MySQL database to `utf8mb4` (or ASCII where appropriate) · Issue #242 · vexim/vexim2 · GitHub
![How to change default charset from "utf8_unicode_ci" to "utf8mb4_unicode_ci" in MySQL in Plesk for Linux? - Support Cases from Plesk Knowledge Base How to change default charset from "utf8_unicode_ci" to "utf8mb4_unicode_ci" in MySQL in Plesk for Linux? - Support Cases from Plesk Knowledge Base](https://support.plesk.com/hc/article_attachments/360020464234/2018-12-19_17_47_01-Adding_Event_Handler_-_Plesk_Onyx_17.8.11.png)
How to change default charset from "utf8_unicode_ci" to "utf8mb4_unicode_ci" in MySQL in Plesk for Linux? - Support Cases from Plesk Knowledge Base
![MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji. MOODLE 3.x: Warning: mysql_full_unicode_support The current setup of MySQL or MariaDB is using 'utf8'. This character set does not support four byte characters which include some emoji.](https://uploads-ssl.webflow.com/623bc20a8d5c4a1ea516549f/6242663cbbd625479a11cbb2_mysql_full_unicode_support.png)