Database administrators (DBAs) are professionals responsible for managing and maintaining databases within an organization. Their role involves ensuring the integrity, security, and efficient performance of the databases. Here are some simplified explanations of the functions or roles of a database administrator:
Functions/role of database administrator (DBA) :
- Schema Definition:
- What: DBAs define the original structure of the database (schema).
- How: They write definitions, translated by a compiler, which stores labels permanently in a data dictionary.
- Storage Structure and Access Method Definition:
- What: DBAs create appropriate storage structures and access methods for efficient data retrieval.
- How: They write definitions translated by a compiler to set up storage and access methods.
- Schema and Physical Organization Modification:
- What: DBAs modify the database schema or the physical storage organization.
- How: Changes are made by writing definitions to modify internal system tables.
- Granting Authorization for Data Access:
- What: DBAs give different types of authorization for data access to various users.
- How: They control who can access what data to ensure security and proper data usage.
- Integrity Constraint Specification:
- What: DBAs define constraints to ensure data integrity.
- How: They specify rules in the data dictionary to maintain the consistency and accuracy of data.