188.8.131.52 explain the purpose of data dictionary
The data dictionary contains data about the database. The data dictionary is very important because it contains information about what is in the database, who is allowed to access it, where the database is physically stored, etc. Database users usually do not interact with the data dictionary, this is only available to database administrators.
The data dictionary describes:
In the project work, the data dictionary is used at the design stage in order to determine the content of database tables:
Data dictionary of table "Students_of_NIS".
1.Explain the term "Data dictionary".
2.Give the list what data dictionary describes.
A school plans to keep records of Sports Day events for different years in a database. The data that needs to be held for each event in a particular year in illustrated in following table Results:
Create Data dictionary for table Results
|Просмотров: 153 | ||
|Всего комментариев: 0|