What are the responsibilities of a DBA database administrator?

Responsibilities include: 1. Specify user access rights and allocate resources to different user groups. 2. Monitor the warning logs of the monitoring database and make regular backups and delete them. 3. The backup strategy of the database should be changed according to actual requirements, and the daily backup of data should be monitored. 4. Standardize the management of database users and regularly modify the passwords of important users such as administrators.

The operating environment of this tutorial: windows7 system, mysql8 version, Dell G3 computer.

Database Administrator (DBA) is the collective name for relevant staff engaged in managing and maintaining database management systems (DBMS). It is a branch of operation and maintenance engineers and is mainly responsible for the design, development and maintenance of business databases. Full life cycle management from testing to deployment and delivery.

The core goal of DBA is to ensure the stability, security, integrity and high performance of the database management system.

Main Responsibilities:

In a general sense, a database administrator is a person responsible for managing and maintaining the database server. The database administrator is responsible for overall management and control of the database system. Including database installation, monitoring, backup, recovery and other basic tasks. The main responsibilities of the database administrator include the following aspects:

1. Design the database design, including fields, tables and key fields; how resources are used on auxiliary storage devices, how to add and delete files and records, and how losses are discovered and remedied.

2. Monitor the warning log of the monitoring database and make regular backups and deletes. Monitor daily database sessions. Monitor fragmentation and remaining table space to understand the expansion of table space and the distribution of remaining space in a timely manner. Monitor modifications to objects. Regularly list all changes to objects installed and upgraded database servers (such as Oracle, MicrosoftSQLserver), and application tools. Database design system storage solution and plan for future storage needs. Develop a database backup plan to restore database information when a disaster occurs. Maintain archive or backup data on appropriate media. Back up and restore the database. Contact the manufacturer of the database system to track technical information.

3. Backup It is crucial to monitor and manage database backup. The backup strategy of the database should be changed according to actual requirements, and the daily backup of data should be monitored. (Related recommendation "mysql video tutorial")

4. Change passwords: Standardize the management of database users and regularly change the passwords of important users such as administrators. For each project, a user should be created. The DBA should communicate with the corresponding project managers or programmers to determine how to establish the corresponding underlying database model, which will ultimately be managed, established and maintained by the DBA. Any changes to database objects should be performed by the DBA on demand.

5. SQL statement: Standard requirements for writing SQL statements. If a SQL statement is not written ideally, it will have a great impact on the database. Therefore, every programmer or corresponding staff member should strictly follow the "SQL Writing Specifications" when writing the corresponding SQL statement. Finally, it must be checked by the DBA before it can be officially run.

6. End-user services and coordination: Database administrators specify user access rights and allocate resources to different user groups. If different users conflict with each other, the database administrator should be able to coordinate users to optimize arrangements.

7. Database security: Database administrators can specify different access rights for different database management system users to protect the database from unauthorized access and destruction. For example, one type of user may be allowed to only retrieve data, while another type of user may have permission to update data and delete records.

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