# Function blocks

- [MySQL\_ConnectionString](/hub/codesys-hvac/en/mysql-library/funktionsbausteine/mysql_connectionstring.md)
- [MySQL\_Close](/hub/codesys-hvac/en/mysql-library/funktionsbausteine/mysql_close.md)
- [MySQL\_Exec](/hub/codesys-hvac/en/mysql-library/funktionsbausteine/mysql_exec.md)
- [MySQL\_Open](/hub/codesys-hvac/en/mysql-library/funktionsbausteine/mysql_open.md)
- [MySql\_Query](/hub/codesys-hvac/en/mysql-library/funktionsbausteine/mysql_query.md)