Data dictionary allow the user to split data about in multiple direction
Universal groups add more data to the global catalog.
DATABASE is a repository of data...... it is a place which holds the entire data together......while DATA DICTIONARY defines the basis to distinguish the data....this can be in the form of tables, views
A catalog is a set of tables which contains the definitions or descriptions of the database structure and its constraints. For example it could store the structure of each file +Type and Format of each data item stored in the file. A catalog is a type of schema and a schema is what defines a data elements and their interrelationships.
Data dictionary is a set of meta-data which contains the definition and representation of data elements.It gives a single point of reference of data repository of an organization.Data dictionary lists all data elements but does not say anything about relationships between data elements.
Data dictionary is a repository to store all information. Meta data is data about data. It is data that defines other data. The data dictionary can be metadata that describes some information about the database.
The integrated data dictionary is called active if it is checked by DBMS every time a data base is accessed. It is always consistent with actual data base structure. It is automatically maintained by the system.The integrated data dictionary is called passive if it is not used in day to day database processing.
difference between Data Mining and OLAP
difference between serch data structure and allocation data structure
The scope of work and the educational requirements are the difference between data communication and data communication information.
The difference between primary data and secondary data is that primary data is the information from the original research.
example of data dictionary
Data dictionary it contains the names and description of the dictionary tables and views.