centos7.7

your database needs to be updated tot 4.4 or maybe some of your packages do not match the correct version

this is not a bug 

My Database version MariaDB 10.2.27

it's about the zabbix DB not de MariaDB Server

https://www.zabbix.com/documentation/4.4/manual/appendix/install/db_scripts#mysql

but we use yum to install zabbix4.4, not able to find the following datbase files
shell> mysql -uzabbix -p<password> zabbix < schema.sql

1. stop here if you are creating database for Zabbix proxy
   shell> mysql -uzabbix -p<password> zabbix < images.sql
   shell> mysql -uzabbix -p<password> zabbix < data.sql

you are not reading the docs 

If you use Zabbix packages continue with instructions for Debian/Ubuntu or RHEL/CentOS to import the data into the database.

this is what you need to run
zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql -uzabbix -p zabbix
last zabbix is the name of the db you still have to provide the password and create the zabbix user in the db first

sure, I followed theinstruction below:

https://www.zabbix.com/documentation/4.4/manual/installation/install_from_packages/rhel_centos#importing_data

but issues are still existing.

Please execute this query on the DB:

select * from dbversion;

and also attach the zabbix_server.log to the issue.

MariaDB [(none)]> use zabbix;
Database changed
MariaDB [zabbix]> select * from dbversion;
ERROR 1146 (42S02): Table 'zabbix.dbversion' doesn't exist

zabbix_server.log

I think you've missed a step from the installation instructions, or it failed. please check how you inserted the schema

Hi

I can't find which step I just missed and I can't find the schema.sql file as we are installing zabbix 4.4 by yum

thanks，that issue was resolved.

but zabbix4.4 for Centos8, we don't know how to add more lang package. Do you know to add extra lang package for zabbix4.4 on Centos8.  thanks