What is a data dictionary in Oracle?
One of the most important parts of an Oracle database is its data dictionary, which is a read-only set of tables that provides information about the database. A data dictionary contains: Auditing information, such as who has accessed or updated various schema objects. Other general database information.
What are the data dictionary tables in Oracle?
A data dictionary in Oracle is a collection of read-only tables that provide useful information about the database including schemas, users, privileges, and even auditing data. The values in these stored dictionaries are updated automatically by Oracle anytime a statement is executed on the server that modifies data.
What is the purpose of data dictionary views in Oracle?
Oracle accesses the data dictionary to find information about users, schema objects, and storage structures. Oracle modifies the data dictionary every time that a data definition language (DDL) statement is issued. Any Oracle user can use the data dictionary as a read-only reference for information about the database.
What is a data dictionary used for?
A data dictionary is used to catalog and communicate the structure and content of data, and provides meaningful descriptions for individually named data objects.
What is stored in a data dictionary?
A Data Dictionary is a collection of names, definitions, and attributes about data elements that are being used or captured in a database, information system, or part of a research project. A Data Dictionary also provides metadata about data elements.
What are the Oracle dictionary tables?
A data dictionary in Oracle is a collection of read-only tables that provide useful information about the database including schemas, users, privileges, and even auditing data. The values in these stored dictionaries are updated automatically by Oracle anytime a statement is executed on the server…
What is data dictionary access?
in: Data Dictionary and SQL. To summarize a data dictionary is a centralized repository of information about data such as meaning, relationships to other data, origin, usage, and format. Active Data Dictionary- A data dictionary that is automatically updated by the DBMS every time the database is accessed.
What is a data dictionary table?
Data dictionary is a table with data elements (columns) as rows and their attributes as columns. Specific attributes vary depending on the purpose of the data dictionary.